Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24ce1f28a3beb14…

MALICIOUS

PDF

86.1 KB Created: 2021-07-02 02:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: a6e0c0907e6e750dce4c542c89d63de5 SHA-1: e4c5b0dc63802828064e38f14ac3c62f36ed9a46 SHA-256: b24ce1f28a3beb140b7bed44af3aca8b70459a9c48f35711877988f810ce79bd
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to potentially compromised websites, suggesting it's part of a link farm designed to host or redirect to malicious content. The heuristic 'SE_SECURITY_BYPASS' indicates the document may instruct the user to disable security software, a common tactic in phishing and malware delivery. While no scripts were explicitly extracted, the presence of multiple external links and the security bypass instruction strongly suggest an attempt to lure the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://kodcomputers.ro/2664/uploads/19615018347.pdf In PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16088e99417123---silidade.pdfIn PDF document text
    • http://leakefamilyreunion.com/clients/63964/File/61070279321.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/13029446030.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/71779156757.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/mowilivesovopipelatoga.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/79222935145.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bd708885d6f---56967761902.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/fofiwopi.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d06e76049f---97048951496.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccad0358e6---5896853454.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/98766564818.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607236c062480---gogisuzubarif.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/1b7vlkq6naum9k83467fqf7qut/famakedabixir.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854102e844d---mubevu.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160701505c60a1---33370009926.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/0e39f0c5b1b896a410da6be21c15a1fb/tesikulibafele.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/g8icrubk90r10tslpjb559t0t0/mujokibakupit.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/faxagigagebaremawafenega.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/dededulemubigedif.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb34773fe9---59412869191.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/lj505smiq1pmksel6cd7gb1j80/47930869092.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/robigi.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/demufipasevan.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/40fc3899e4ac5d8c8f5aeb8731b8e219/wemewamixuro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=download+naruto+ultimate+storm+4+apkPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 17256 bytes
SHA-256: b86711ce783f7729d5e88f8414b7f000ddad5c6b98067c6fbd4025941e3676bd
font_01_sfnt_off00011965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11965 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001317c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317C 10908 bytes
SHA-256: dc1b51188e7ca6275e3dcc893c6b0ec5326bafe46ab582b221d2330c009b83f4

Open this report in the interactive analyzer, or submit your own file for analysis.