Malicious PDF — malware analysis report

Static analysis result for SHA-256 675e4660a5412080…

MALICIOUS

PDF

72.0 KB Created: 2021-03-03 20:44:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 09093892f054dc797be240723f1de1a4 SHA-1: a9200b3440f7e3cecf088e3b29c333f545ab6e78 SHA-256: 675e4660a541208052f046488fac187c8620413a141ea0fe6c547fa916d06989
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://gimoguvi.ru/strik?utm_term=what+are+the+5+ap+world+history+themes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417669/normal_5fcd83f2b462c.pdfIn PDF document text
    • http://parkji5x.xyz/66642545257z7nnm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5fe973fa2052e.pdfIn PDF document text
    • http://lynciguest.com/sagademukimabuxosowaloboh66li.pdfIn PDF document text
    • https://dezilitew.weebly.com/uploads/1/3/4/7/134728488/5269432.pdfIn PDF document text
    • https://jujavaxoziwes.weebly.com/uploads/1/3/4/1/134108829/vojepudujexu-muwepudisuwesag.pdfIn PDF document text
    • http://strita.space/adivasi_timli_song_videohm1ep.pdfIn PDF document text
    • http://bestunew.xyz/scarra_teamfight_tactics_item_cheatu0ri9.pdfIn PDF document text
    • http://gatorama.space/93178408014a7v1p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415302/normal_5febf72a17d3e.pdfIn PDF document text
    • http://bukenisefino.mygamesonline.org/79853807562.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/kosamupim/google_chrome_apps_for_pc_free.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_off0000de7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7E 5528 bytes
SHA-256: 9104b6917edd41950ff50950a5a08edff181aee9d91fa6e86ae6b4eb8d10b874
font_01_sfnt_off0000f13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13F 10032 bytes
SHA-256: 60dadf38e0145ac4c527973c6522b0ab5ee8049b91934d342b695160bd36d627

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