Malicious PDF — malware analysis report

Static analysis result for SHA-256 097b67e90cc55b90…

MALICIOUS

PDF

80.3 KB Created: 2021-05-20 02:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 39dbfefe4863440dbd01a240d291944f SHA-1: 2ce102cda484580408e99efad34b5f4a76aec9b8 SHA-256: 097b67e90cc55b90b15479bcd12d2007d690b3b6141cc405ffa3f593edfe288e
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and Weebly-hosted files, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially used as a lure or to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/strik?utm_term=resident+evil+4+pc+mods+graphics PDF link annotation
    • https://bujozimadepaxed.weebly.com/uploads/1/3/4/6/134615651/7147209.pdfIn PDF document text
    • https://rexuxoxef.weebly.com/uploads/1/3/4/0/134018301/015807434.pdfIn PDF document text
    • https://navubuxodogonid.weebly.com/uploads/1/3/5/3/135327143/551b04382223b79.pdfIn PDF document text
    • https://fanarise.weebly.com/uploads/1/3/4/3/134377412/pedowef-dezabewuvem.pdfIn PDF document text
    • https://mesubepivugegej.weebly.com/uploads/1/3/2/6/132682347/rabigu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493610/normal_6028e1d04e0fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426424/normal_6057039a0b143.pdfIn PDF document text
    • https://bamegipizof.weebly.com/uploads/1/3/4/6/134647446/zareno.pdfIn PDF document text
    • https://mitusifizipera.weebly.com/uploads/1/3/5/3/135300422/eeb98672ab6df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421350/normal_6028e38cc7ba1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411926/normal_5ffbc5edcc01c.pdfIn PDF document text
    • https://xemexavowud.weebly.com/uploads/1/3/1/8/131857479/sovim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368956/normal_5ff9e94cbe2b6.pdfIn PDF document text
    • https://fomofasagulak.weebly.com/uploads/1/3/4/8/134860280/eb593b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_60469b0bc8b37.pdfIn PDF document text
    • https://webexozaputer.weebly.com/uploads/1/3/2/6/132681415/7157803.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458122/normal_5fc9bbde404ba.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/tapexiw/platformio_ide_installing_atom_dependencies.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/46207448369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae9886d-8875-42c3-bb1d-8597c9db8c25/logitech_z506_5.1_surround_sound_speakers_drivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac87e67-364d-4d9c-b83a-6dcdb3508d8c/70471036977.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/12639882516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8b82296-8b02-49d7-9973-c51adcfeef93/battery_tender_jr_or_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/journee_d_information_chambre_des_metiers_annecy.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_off0000fad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD1 5644 bytes
SHA-256: 7018dbd07638be9ce58fd97d6df4cb9db070e11858f46c3246a8cf8b7f39476f
font_01_sfnt_off00010df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF2 11128 bytes
SHA-256: f34b450765df662438d2599a58e0d86fb633df004b60d98eb15235df0628f683