Malicious PDF — malware analysis report

Static analysis result for SHA-256 41907220007e5d08…

MALICIOUS

PDF

77.5 KB Created: 2021-06-09 08:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 404966b660d5fe2fd32d22440e285039 SHA-1: 32d17e2b9cd40c31854d043dcf3c590528f5ea1b SHA-256: 41907220007e5d0801bf229dab54481d41f37f868e5ecba9e9b87ee3845cf39f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of PDF_URI and PDF_SEO_LINK_FARM heuristics points to the document's primary function being to redirect users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crewmak.ru/pbw?utm_term=bill+nye+the+science+guy+food+web+worksheet+answers PDF link annotation
    • https://rezomiwutamanap.weebly.com/uploads/1/3/4/3/134362688/870553.pdfIn PDF document text
    • https://xajaxosu.weebly.com/uploads/1/3/5/3/135304217/7a40bd3d8e876cc.pdfIn PDF document text
    • https://dowawanezezezo.weebly.com/uploads/1/3/1/0/131070762/podawozolebowew-soxobodo-tapalawub.pdfIn PDF document text
    • https://kitopelok.weebly.com/uploads/1/3/4/3/134355781/zovoz_nizefibitawime_xalelipizajilop.pdfIn PDF document text
    • https://tadiseregofinu.weebly.com/uploads/1/3/4/7/134748358/tumavewed-mefuwuvozuro-disapexalubigel-dikukipetasuna.pdfIn PDF document text
    • https://mosodufenu.weebly.com/uploads/1/3/4/8/134889918/dinevesidat_bibugeril_vobifa.pdfIn PDF document text
    • https://wazafalesozem.weebly.com/uploads/1/3/4/4/134498636/dolifofubixo-midepadugama-jaloxogesem.pdfIn PDF document text
    • https://nodekisoguzila.weebly.com/uploads/1/3/5/3/135313862/596379.pdfIn PDF document text
    • https://noparerekum.weebly.com/uploads/1/3/4/6/134639333/lomem.pdfIn PDF document text
    • https://purelukanixavaj.weebly.com/uploads/1/3/1/4/131454065/wugidit-kibuz.pdfIn PDF document text
    • https://bakofusu.weebly.com/uploads/1/3/2/3/132303024/nukopikev.pdfIn PDF document text
    • https://xemudimiju.weebly.com/uploads/1/3/4/8/134861016/xanirem.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/6a2496f0-3ba6-4235-805a-6b7e662925f4/libro_arquetipos_e_inconsciente_colectivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04fd4e02-ec6b-426c-8219-8f982f0995c9/81653515850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36217931-f1ac-423c-bcee-b765343646f9/vazefemomixadonujip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff3d179d-21a9-4308-8877-6c2374063209/29935271470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40d9be0-d7e7-481d-a331-f579a11d2e64/are_autopsy_reports_public_record_in_ontario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f88d0285-a6d7-4c6d-8c36-cc7026cf09ad/dominican_republic_map_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/744a6d19-6499-41f7-8ce7-7ae77c7ecb97/what_was_happening_in_the_1600s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b47dc3-b82f-443b-bed1-2cf3b467cecf/zawakiragigodebuzidumuvon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/499f6b5c-a032-4e38-9f78-cd1f1c88c9f4/49968857806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4fe75e-ac2c-4490-94b3-e776dbe41b3d/wivoboziz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcdda75a-316a-40ca-9919-12c3ea8621a0/40490549312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19adc127-f1d8-4f0a-9362-45cdd22ca16c/que_son_verbos_regulares_e_irregulares_en_ingles_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/890f88f3-7077-4ab0-8297-d87eb710a541/wuvumolufuzuwitepaxutu.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_off0000efbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBC 5728 bytes
SHA-256: a8b6ea90b5c53b920971595208c417287c8454714b514db8ddb1e3dff471bd54
font_01_sfnt_off00010358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10358 10712 bytes
SHA-256: fadd26e1437d4b551dba943cf8cf5e86591c1263d2f992c63d4f8bcfcd22c916

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