Malicious PDF — malware analysis report

Static analysis result for SHA-256 48727b4a87435886…

MALICIOUS

PDF

76.2 KB Created: 2021-06-11 05:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 992284f4a6c843765d06d4331e7bed58 SHA-1: c9445460eb4f00870c9702d7b6b0c7a375de0faa SHA-256: 48727b4a874358860d605b6530bdc74a563b2d88725a3a38e9723dc8be1cd12d
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the presence of numerous external URLs is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://oniceh.ru/pbw?utm_term=how+to+make+slime+without+glue+steps PDF link annotation
    • https://zikemuwebiwolim.weebly.com/uploads/1/3/5/9/135992964/11c15b35ebcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476946/normal_5fea3883c2778.pdfIn PDF document text
    • https://zagesugob.weebly.com/uploads/1/3/4/3/134379314/7f4475a8803ad6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489428/normal_60383ec63f803.pdfIn PDF document text
    • https://fefaxunitu.weebly.com/uploads/1/3/4/3/134399706/vofowaj_rofugavukekib_zorakefisi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5ffac053cb0c6.pdfIn PDF document text
    • https://xexifenenufomag.weebly.com/uploads/1/3/6/0/136082553/mizusasudawonomivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_6034c59152c10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_602d719243ff3.pdfIn PDF document text
    • https://bizizavo.weebly.com/uploads/1/3/7/5/137502277/vexiref.pdfIn PDF document text
    • https://dewubolisevibe.weebly.com/uploads/1/3/4/3/134318954/wujadogo.pdfIn PDF document text
    • https://jumozapanase.weebly.com/uploads/1/3/6/0/136001057/7868028.pdfIn PDF document text
    • https://roxadiruxezagu.weebly.com/uploads/1/3/7/5/137514248/279352.pdfIn PDF document text
    • https://mawatewif.weebly.com/uploads/1/3/0/9/130969671/vafikisuti_kalukomipaxije.pdfIn PDF document text
    • https://xitokudid.weebly.com/uploads/1/3/4/6/134688137/47b5a22ccf823.pdfIn PDF document text
    • https://xaweregosakub.weebly.com/uploads/1/3/1/4/131407668/94ae8a31ca.pdfIn PDF document text
    • https://gelurojaf.weebly.com/uploads/1/3/4/6/134697462/c238b9f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_605ab33e8698a.pdfIn PDF document text
    • https://pojosividadom.weebly.com/uploads/1/3/4/5/134524524/cb2c84f1f69b2.pdfIn PDF document text
    • https://mawijazug.weebly.com/uploads/1/3/1/3/131380733/8d8dd9bdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486061/normal_601e10f3f06a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/df4fab4b-78e5-445b-ad15-df9a2c9d243a/how_much_does_rslogix_500_software_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da0e58e-9d7a-46db-a2c2-11aaa4f72e90/13610856794.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 5252 bytes
SHA-256: a5d62d91e10a55c58d54ce413cc00ebfaa9f5ceab3a160f19f57a59bb3031daf
font_01_sfnt_off0000ff3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3B 10372 bytes
SHA-256: 461b556ab412b6d7059aa81d2a97fd889a2df099540d7224ae44bddd9d5d1f8e