Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dab20734c66af07…

MALICIOUS

PDF

75.1 KB Created: 2021-06-10 12:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b73e93a2cbed603fb9c59ce63581f25a SHA-1: b88e9402f3af83f1f4f55ef99ae77552293f6d11 SHA-256: 8dab20734c66af07a0740ed943dfbcb0ea45f27cfe2a115464120cad760df3f9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://catamma.ru/pbw?utm_term=efootball+pes+2020+ppsspp+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402533/normal_5ff6a366a287c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472188/normal_606393759b21e.pdfIn PDF document text
    • https://nivagevap.weebly.com/uploads/1/3/1/4/131438423/biviba.pdfIn PDF document text
    • https://fejavuwuvumago.weebly.com/uploads/1/3/0/8/130874007/lirulalezunaw_vupeliban_totas_siziruxusinida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484624/normal_602568375374e.pdfIn PDF document text
    • https://rudozusaviso.weebly.com/uploads/1/3/4/0/134041113/eb59491b248.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_5fca0296c4e93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415935/normal_603612df65d9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461205/normal_6066956354308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379362/normal_6068242889019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_600cf511936be.pdfIn PDF document text
    • https://lizoduloto.weebly.com/uploads/1/3/4/7/134701777/8395527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447649/normal_6046542670906.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siwuromo.pbworks.com/f/twilight_saga_part_3_full_movie_in_hindi_dubbed_download.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/how_to_lose_weight_on_starch_solution.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144418959/poliboloduwewonarodunozon.pdfIn PDF document text
    • http://molitutolu.pbworks.com/w/file/fetch/144997395/mallard_travel_trailer_owners_manual.pdfIn PDF document text
    • http://wirajudukim.pbworks.com/f/2016_harley_touring_service_manual_free.pdfIn PDF document text
    • http://wigiwopajuke.pbworks.com/w/file/fetch/144533739/77950156372.pdfIn PDF document text
    • http://wixumip.pbworks.com/f/befaledowesuponimesi.pdfIn PDF document text
    • http://podixarutib.pbworks.com/w/file/fetch/144839007/minions_movie_download_in_hindi_480p_worldfree4u.pdfIn PDF document text
    • http://dokajawema.pbworks.com/f/lalogotakupogulezifugamer.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_off0000e6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 5404 bytes
SHA-256: 94a7c1f129a454e56f016d1b4c481cd044bdcf45aafc7dda60ccb3587393776e
font_01_sfnt_off0000f929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF929 10748 bytes
SHA-256: 9666e35aea909b231fb6b8304e62e62ee97faa3cf31d9935ceb773a1e8b8ba5b

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