Malicious PDF — malware analysis report

Static analysis result for SHA-256 076c172677f2864b…

MALICIOUS

PDF

81.1 KB Created: 2021-09-01 02:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6d645afa2835179a46fbcc2e53b40a56 SHA-1: 394fe0b0730bb8fde4f5c92fc246533df8cd3a47 SHA-256: 076c172677f2864bc63200b57d2973cafc608722d98401ba8685a0d2363ef141
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many of which point to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dodomacnosti.net/data/file/nutozamorutewu.pdf In PDF document text
    • https://thaiwoodengames.com/files/upload/files/sozarelimobunava.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160929749e9db9---samelidasopogubilen.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607df66a7eadc---95234336594.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/59524083926.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef57d9ec96---47741505253.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/degazofupejodanuna.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/navukamamiromagedujezixez.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/g6cvh7d15dujb6n9lge10mbtdf/95988006187.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/jidotabivulibimomodoxekod.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/e4qqs0eq4mi5nber4c60e83men/28512762489.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/89096643466.pdfIn PDF document text
    • https://datawire.gr/files/files/62700427890.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/xepewawimabitawemaxujawek.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/cc62390f87626123cdd6983a4e67825b/35407137615.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/87176536797.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/wuxevog.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/cue9q2aqsvmsgnjkg2d2nade62/mimekubewigijulirulisi.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/70a35c11f9ee05ccfabc3a08600273fe/79313714413.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/8cc407e45a58d592038185291e068f05/dixezajiteporusumut.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/43698321830.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/r68n3eslke7g300fe7kg80n34c/xagagelavorexekepevix.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/notepagom.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/bulufunuxeguruno.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/t7ttc0nejs240bdnlmq6hpdmii/99096542273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=must+could+should+wouldPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE781 10056 bytes
SHA-256: 7dedf0677873db955b8d595fd5b1f894143a9a38e6eba27dde1768fe018f9b7b
font_02_sfnt_off0000fe1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1C 21112 bytes
SHA-256: 45fb541e1b5aadea9339e29155fc3c1123d2c1198b1a4a04b64c6904a8c472d1