Malicious PDF — malware analysis report

Static analysis result for SHA-256 6914a94d24970a86…

MALICIOUS

PDF

112.0 KB Created: 2021-03-22 19:39:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2db88b845ad609a22e79f8c62b024c28 SHA-1: 245c9b396c9466ad2dbf0a5808f790c2002f3d7a SHA-256: 6914a94d24970a865285cf9a484aa59caf87efa06a81f026dfe7e9a2f7552241
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 hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=absurdism+theatre+pdf PDF link annotation
    • https://dimejozetef.weebly.com/uploads/1/3/1/0/131070151/vemumokizedut_sefafuloguxoba_fasok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387582/normal_6054c02e9fa60.pdfIn PDF document text
    • https://safesawugu.weebly.com/uploads/1/3/2/8/132814337/149ff4edeafd4.pdfIn PDF document text
    • http://whalesqpa.fun/1318016895nlxwb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_601764b4be258.pdfIn PDF document text
    • http://kikawogax.iblogger.org/steuererklrung_2020_formular_anlage_av_download.pdfIn PDF document text
    • http://tcerkovniekupola.space/44393668386t0vnk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456686/normal_5fec3a6c807bc.pdfIn PDF document text
    • http://itclick.pro/xezatebiwadetovezitawevu7aj0x.pdfIn PDF document text
    • https://mibiduzomezo.weebly.com/uploads/1/3/5/3/135327428/155999.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463277/normal_5fff66e6d83a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501212/normal_600bc14531a01.pdfIn PDF document text
    • http://tiserud.22web.org/66165525386.pdfIn PDF document text
    • http://confirmationhelpcenter.com/how_to_clean_lg_front_load_washing_machine_gasketx37d1.pdfIn PDF document text
    • https://xudekumuf.weebly.com/uploads/1/3/2/6/132681038/7696667.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zakivijojinikij.epizy.com/fekolegoxu.pdfIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_bc8b115a9a7247b3be63c2531ebc118e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roxawo/guided_other_synonyms.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/12726310471.pdfIn PDF document text
    • https://63a0a607-6d1b-4b95-a813-f1b07cabc719.filesusr.com/ugd/ad56f2_1547859735d741448b1d6753678eb623.pdf?index=trueIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_d8928f58885c48ffaef82dd01b9aac4c.pdf?index=trueIn PDF document text
    • http://xijidejejinenoz.rf.gd/snow_white_evil_queen_costume_child.pdfIn PDF document text
    • http://tokofelutuj.epizy.com/90956681182.pdfIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_aab75674a0e54dbbb1cf40b6d8459db8.pdf?index=trueIn 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_off00017409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17409 5376 bytes
SHA-256: 13727af9f2b327bbfa170719887303b950a7e00595d635fa5b61b5b3ce8f4e42
font_01_sfnt_off0001861f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1861F 13680 bytes
SHA-256: 229984845c5780e7644f4daf0cdf98ef7e16bc12c2dd2b59948b2ddac22d64fc