Malicious PDF — malware analysis report

Static analysis result for SHA-256 d938b78002592800…

MALICIOUS

PDF

95.9 KB Created: 2021-06-20 15:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 588246389bdfca982402a4fab78b2fe9 SHA-1: 988552f1374a89c642869a7dbf2b5c29a3cb024e SHA-256: d938b78002592800bd66c72ae7615bfc36ace1e1d37a064d3224a49eb2d14291
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains references to popular media, likely to attract user clicks. No scripts were extracted, but the presence of numerous external links indicates a high likelihood of redirecting users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://oniceh.ru/uplcv?utm_term=my+hero+academia+season+5+episode+5+english+dub PDF link annotation
    • http://www.dismaplant.com/ckfinder/userfiles/files/zumuwani.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/97843d2cacf5ed9a9243e41807c73400/vinavomapar.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/aa4484566e45bf19243ca7674c8d8c0f/74123428117.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/golasu.pdfIn PDF document text
    • http://mobilenmr.com/files/files/tefawobaxadexugo.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/gti4vehm2316eah3k2shlighid/93320395970.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/nojiw.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/67udq2ov5d609dl9lb42bkuv8f/69104803442.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8a098da0c---28465086147.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a47e5182a---pogikunuwiwilosew.pdfIn PDF document text
    • http://northcity.rs/slike/files/28654306801.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd1580200c---mesivunexeriwezodewijan.pdfIn PDF document text
    • http://centrons.com/uploaded/file/38160849760bd3489b39e9.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077596f8fd35---52580067533.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160802a52dabfe---relorewibowumegesufow.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/81b67c469a3b39df76f097fd44e9d170/72505494896.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6B 23736 bytes
SHA-256: 6dc0f194e5a1487bac64ebadbcca1a7c4d7db80117edd6889c32d3c5d02af505
font_01_sfnt_off0001368e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368E 5856 bytes
SHA-256: 1817c2ca13dadcbe455c6075157057d16e6e9c2335cadea3fe2f82645e07045b
font_02_sfnt_off00014a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A62 12156 bytes
SHA-256: 976f445c855da6f9c06a4bc74c9d5d830d124f3fe2743d7af269411049c5dd37