Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf51bfd74ec84ac…

MALICIOUS

PDF

80.1 KB Created: 2021-02-18 07:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4973176df16528157714724cb10b9635 SHA-1: d053a6d8985766f24a3d63e21995ef8db055453c SHA-256: bcf51bfd74ec84ace11251ca90dd65b15a15192711fa3ddc1490dddf14689e08
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The primary URL, 'https://seumenha.ru/wix?keyword=the+dead+and+the+gone+detailed+summary', likely serves as a lure to a phishing or malware distribution site. No scripts were extracted, but the extensive use of external links points towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=the+dead+and+the+gone+detailed+summary PDF link annotation
    • https://niniteju.weebly.com/uploads/1/3/0/8/130814631/5204468.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/jlOUnrF/tiny_bubbles_song.pdfIn PDF document text
    • https://cdn.sqhk.co/kujusiru/mgfjhhY/free_music_downloads_for_phones_full_songs_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_602da1ef717ab.pdfIn PDF document text
    • https://nefajawijar.weebly.com/uploads/1/3/6/0/136081949/rofasugokinotil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375541/normal_5ff5cf133e9fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366653/normal_5fd08f329a82e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_60258349e96a9.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/5251266.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387586/normal_5fe50ca29419d.pdfIn PDF document text
    • https://mebevoluw.weebly.com/uploads/1/3/0/7/130739105/d1c4b4605a8.pdfIn PDF document text
    • https://nugenezeni.weebly.com/uploads/1/3/4/6/134632238/6d2866d4a72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485578/normal_5fc582a0dfc2a.pdfIn PDF document text
    • https://cdn.sqhk.co/judixixelof/ghArGig/homicide_squad_new_york_cases_cheats.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454561/normal_5fc584d19f92e.pdfIn PDF document text
    • https://cdn.sqhk.co/vopokemib/ij1geCt/26079069858.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFA 5288 bytes
SHA-256: 331431b3a2f7ccd3800e510583a0299f6d7ee6537e85a670b267724aa8218315
font_01_sfnt_off000110d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D2 10000 bytes
SHA-256: cfc7ccf0f29db93ee7344e2fde34149f09c87f284d851bd3452bfe84aa2b1d5b

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