Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67e0b6f9184dce8…

MALICIOUS

PDF

78.3 KB Created: 2020-11-17 17:13:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8287d7eba4079b06291a816d69261260 SHA-1: 97c1c0fd2ee07a4147f80dfdaeb5a9fd19a2e125 SHA-256: b67e0b6f9184dce802837136fb20c1f8a647f53691f72bad3b98b7c19be594b1
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with a specific URL containing 'roblox clothes id boy' suggesting a lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a phishing or SEO manipulation attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffnew.ru/123?utm_term=roblox+clothes+id+boy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5f913826c412d.pdfIn PDF document text
    • https://galebekamabe.weebly.com/uploads/1/3/4/3/134305591/5771210.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/bedijenutowulixa.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/bffe920c.pdfIn PDF document text
    • https://poxesogu.weebly.com/uploads/1/3/4/8/134854809/miwubejufani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449172/normal_5faee881554ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450516/normal_5f9eb97027534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389366/normal_5f9235ba5a57a.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/ripotot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/memez_virus_download_link.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e2f63f-982b-4132-8607-aadce2887bba/61120273597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5710eb0-4666-4f75-9d4c-7b484bbfc4a2/tonutusaviwusunejazaxovot.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7D 6868 bytes
SHA-256: 54edc7f2d1f9050f1f8934f6abf6c0e1d97b945b9579d54cd42131964e87bfee
font_01_sfnt_off0000dbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD7 5040 bytes
SHA-256: 885e94bf01a01e677913948fea9e3616324c38bf6c8584ccad98d363c074e98d
font_02_sfnt_off0000ed0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0C 11396 bytes
SHA-256: f5148d872890f253779d6c9f27b5971d278da39c6c5dc05819a61a70a112671a
font_03_sfnt_off00011421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11421 17184 bytes
SHA-256: 73f128b9903a9adb0aee151bc214dbae546c09d489bb14f1270277506a0d30ac

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