Malicious PDF — malware analysis report

Static analysis result for SHA-256 1179ae52eea35455…

MALICIOUS

PDF

85.6 KB Created: 2021-09-05 23:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 783d3967a9e16316bbdb2703adc16854 SHA-1: befc1afd5a80c6b4bb1695a941d709477ff4a6fd SHA-256: 1179ae52eea354553024e0b111d938e04f30d9c9a82cec21da0ef14c1be1738c
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution lure. The PDF structure and embedded links are consistent with attempts to redirect users to malicious sites.

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://catamma.ru/uplcv?utm_term=electrons+atoms+and+molecules+in+inorganic+chemistry+pdf PDF link annotation
    • http://artpolinakuzina.ru/pict/file/52972325947.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/658e5965572232e1a63bd62458712de5/86570243917.pdfIn PDF document text
    • https://laserbeautymachine.net/d/files/82214405817.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/f3a463920a183e41de65d3ad6910479a/viramizowematutunef.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7b31b1c3b---xasexivolikoge.pdfIn PDF document text
    • http://bereanbaptistashton.com/clients/1/1c/1ca8668e480cca1e897b6add33210fc6/File/jidofunexukoxejeweta.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/gojizufi.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/9b3a72103290036dce1b775e8b9de2df/sajomepejafudewonowob.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/43d70f6bbb88ebe3c33afbecda950432.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/ditofuzaze.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/54347904198.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/79663064096.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///53970997011.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/46a5afd3f170532d81dac04ce5f73023/vesegoridiniwuzexoxabex.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/98d009f508109ef79fd9d3035a592375/lotizivebubozegitonis.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/begexu.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9e604b5f0---60791473718.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/xurotafuvikafotojojupa.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd104b54a65---likalil.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/suwawikas.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16109944591f46---11806138442.pdfIn PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/pasoreledusadonaz.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_off0000e845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE845 11264 bytes
SHA-256: db735bfe673e21f2e789a8a9568cff28ae4aac453847ace919d2c508832b918d
font_01_sfnt_off00010250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10250 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A62 17832 bytes
SHA-256: 9150ae9abcf5ed1e77bc17c9157cd7501fa91af661a2f3f5b837e4ea555422e5

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