Malicious PDF — malware analysis report

Static analysis result for SHA-256 3afb313932e873ea…

MALICIOUS

PDF

84.7 KB Created: 2021-05-30 19:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 21046524dd971c586edc4bdfd848db22 SHA-1: b4aa1f33c7111f1b0999fb67d8a6e57ec9d9db5d SHA-256: 3afb313932e873eabd0b3425e4eed66a609e54e518f8287ab1c539a52d09491e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The presence of a URL like 'https://soxebez.ru/strik' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=what+is+included+in+company+profile PDF link annotation
    • https://girusetobar.weebly.com/uploads/1/3/1/0/131071114/misir_todokif_zulusazuzoviziz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445879/normal_6001eaf953175.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4449604/normal_60b2fecae0d8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425915/normal_5ff6d1000fe23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5ff8b2b46864b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491151/normal_5fda90f36a288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472764/normal_602c78c61ea65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404959/normal_60326d1c3cfd0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367617/normal_6002770901388.pdfIn PDF document text
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/kodaraxozux_lofiteworala_woxosimofol_bifewasediwex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421781/normal_6056b43709a7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451927/normal_6065505e173da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488574/normal_603283accc4e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474746/normal_5fcca591f18ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502188/normal_604b0fe03a363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5fe794c87474e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480145/normal_600a11aba2676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_604ca538697f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f8b7cfc5-0141-4187-aa83-145a3887d0d3/radioactive_decay_word_problems_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa67ef4-422a-4d89-abc8-c455dc373040/how_do_i_apply_for_kaiser_permanente.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40f43736-679e-4b56-988b-b7c4ccc5cf99/58091615175.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE16 5392 bytes
SHA-256: f432630a37f0be83a8a25650996bed711148168551ad459ea7d4d87973b8b37a
font_01_sfnt_off0001103d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103D 11332 bytes
SHA-256: ceb58b379aa4cebb57368f25827cbb5dc850670fad34b6326dbb7e4ee2f06375
font_02_sfnt_off0001370f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1370F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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