Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc04dde3f51b73fc…

MALICIOUS

PDF

82.4 KB Created: 2021-07-06 02:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 37dac398c6ab53334b20562f15bdab34 SHA-1: 945dc05e5e9d6479375d8f897c91b91b52c1e603 SHA-256: fc04dde3f51b73fcb667e942278f46408232970951930e80827c1cbae6131b56
156 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, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, which are often used to host phishing pages or distribute further malware. The presence of multiple external URIs and link farm heuristics strongly suggests this document is part of a campaign to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://archism.ru/uplcv?utm_term=i+just+wanna+see+her+beautiful+you+are PDF link annotation
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/f85fc40a3ee691d6f935f36ff5945029/38170397705.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57da8219af---dedegevezulurafufimixuku.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/b21463f93983ff07d95e03b137f22160.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/32658229852.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39e506077c---nizakijamami.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/97f089905f82c8d3fbfbd390fa17d8ee/jesuxezovovifo.pdfIn PDF document text
    • http://lucann.com/Upload/file/57147013415.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/ramusasibaroxiwodatofekad.pdfIn PDF document text
    • https://faprosid.com/file/75169575594.pdfIn PDF document text
    • http://rowsontw.com/shopadmin/upload/files/96300445561.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/rozeridovazomixusowewawe.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160727b8819de5---vixazozekubuso.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e38f655c978---89888366818.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa7471dbd9---jonaxawol.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/32302737785.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/1103408014.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/cc635a7674bda1669ff9ebcb95b73a01/vemeluzokumedafako.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c96ca0adb4---32829878085.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/bc4d1108dbbd7b43c36c78f24d368b0e/suxusiburumilifunebodesak.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/lod0349a8mroo7266t1ho9c9pc/8823440986.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/8bf0b93bd7f07f3c0afe98d901eaa7aa/xujubixuw.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/4qv1a0c3pcn4ovinnfi2pukgj1/10167421678.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

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_off0000dccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DD 17156 bytes
SHA-256: 4ad80b8474c47b4b2cecee1c3973f8e23f063229ff0c7a7e5445f8cb619352eb
font_02_sfnt_off00012153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12153 10832 bytes
SHA-256: 0853bdfcfbbf9c64ca2c7017c8cada4e18b9643418580092d62b8053fcd92fcb

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