Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb5122e4eaced10…

MALICIOUS

PDF

79.4 KB Created: 2021-05-30 16:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c010c4ce5d08a9a3f6c55668f55a3f8 SHA-1: d30ae15b3b0ff3d00e76fc19f6cf04cbe04bec7a SHA-256: bbb5122e4eaced1098af7640f967566ef2f38b45400ce369ed1c67f650e340ed
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary lure appears to be a search query related to a video game, likely to attract unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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 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://nipisod.ru/strik?utm_term=how+many+gb+is+apex+legends+nintendo+switch
    • https://ramujodavuratot.weebly.com/uploads/1/3/4/6/134667495/zudenotin.pdf
    • https://static.s123-cdn-static.com/uploads/4382629/normal_5ff217a8c216b.pdf
    • https://wupovejiti.weebly.com/uploads/1/3/2/8/132814541/265593.pdf
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/7322124.pdf
    • https://jumozapanase.weebly.com/uploads/1/3/6/0/136001057/1797627.pdf
    • https://cdn-cms.f-static.net/uploads/4403539/normal_6011c8271465d.pdf
    • https://cdn-cms.f-static.net/uploads/4481552/normal_6043444f4e0f7.pdf
    • https://nodukuzizowuw.weebly.com/uploads/1/3/4/0/134000349/kiniwonapuwotuj_bifafenar_wejeletuvonise.pdf
    • https://mojiwisixireze.weebly.com/uploads/1/3/4/6/134615440/nasosuriwulejavi.pdf
    • https://gifonoxudofi.weebly.com/uploads/1/3/4/3/134322056/9490124c29.pdf
    • https://duziduwavi.weebly.com/uploads/1/3/1/0/131070207/3959407.pdf
    • https://gelixilononusi.weebly.com/uploads/1/3/0/7/130775878/dolemavixuxekirefe.pdf
    • https://static.s123-cdn-static.com/uploads/4370064/normal_5fdde542eaea0.pdf
    • https://static.s123-cdn-static.com/uploads/4502721/normal_6007b867003e1.pdf
    • https://cdn-cms.f-static.net/uploads/4370269/normal_6059ed2bad1b2.pdf
    • https://puwukozo.weebly.com/uploads/1/3/4/5/134587621/niwari-xibese-gonojutotebu-pozekiso.pdf
    • https://cdn-cms.f-static.net/uploads/4482853/normal_60323c1ba71fb.pdf
    • https://static.s123-cdn-static.com/uploads/4464852/normal_5ffac3e0b9c1f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/db514946-11ab-4394-accf-2d29a951b37a/vowexadarenezememuge.pdf
    • https://uploads.strikinglycdn.com/files/60218c9b-760e-4c4e-8f2b-69b08b8884de/what_does_logical_mathematical_mean.pdf
    • https://uploads.strikinglycdn.com/files/6df9eb7f-e59a-42b3-bbaf-b4b3ae18e8d9/watunulagewusasilulex.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1cb.bin
9912e4a5c76c81055c3bdc40bbc35d7a5ff8dacfc9c9f196b6f3b4c836e66ad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CB 5752 bytes
font_01_sfnt_off00010554.bin
af50ba3e5ec2c54413911573fac351584e4806b2219b8092b69a6898921c7149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10554 12552 bytes

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