Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc41e1d2101222c…

MALICIOUS

PDF

77.9 KB Created: 2021-09-14 14:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 259b68080890c6eb68818e4e670eeaab SHA-1: ab7a9f2bf0553546103d19faf5cefc94160fda86 SHA-256: 8dc41e1d2101222cbad35ef9c9febb17d7fc235d471d3d98ce354de251f5efd7
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Multiple heuristics point to the PDF acting as a link farm, directing users to various external URLs, some hosted on compromised WordPress sites. The presence of numerous PDF-related links suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://huntic.ru/uplcv?utm_term=rush+rally+3+download+android PDF link annotation
    • http://teamtrinity.net/trinitya/file/belexerag.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/f1e081d8666d6c5e89eeb588ce7dde9f/44635313767.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/47229633507.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/58551217308.pdfIn PDF document text
    • https://losaltos.com/wysiwygfiles/file/nezawolugofosel.pdfIn PDF document text
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/71305081278.pdfIn PDF document text
    • http://esistore.de/userfiles/file/sosov.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/5077500439.pdfIn PDF document text
    • http://119pump.net/d/files/15793651107.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0225716001630554424.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/dekenilefogumifana.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/jivosipujowuruzasomidoxa.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/161354cf922f1d---mujexukobakikekuwufubazij.pdfIn PDF document text
    • https://onecre.com/images/content/files/diguwatavawaxe.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/bidetow.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xowedib.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/78f92dcebb4d29bed2bbbe107dfde095/81432871740.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/62442955977.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/vefidujezovuminatitik.pdfIn PDF document text
    • http://gemmacapitalgroup.com/foto/file/pubesedemoseloriwevuvit.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/54804191321.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bebewutudogiwupariwixu.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/1099443935.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/gabegexatesojevorizolikor.pdfIn PDF document text
    • https://pecsikult.hu/files/file/13274335011.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/88110938819.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/sanotosumiwofipot.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88E 18724 bytes
SHA-256: b626de86ff88b6dcab435241c466f33f46abd614dae6d3f468c482c4f08cafe6
font_01_sfnt_off0000f905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF905 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001111c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111C 10632 bytes
SHA-256: 9c330ad66ff5a592a6c0bc552aaae58d356ceacea39a8e6ad5c0bb32f15f1e82

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