Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b6b1191db66a8a…

MALICIOUS

PDF

72.2 KB Created: 2021-03-21 09:25:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c35bd63b537058fca077600f09fd98c1 SHA-1: 8941bf345310001520b29e2fa9193967ce45c0e2 SHA-256: a5b6b1191db66a8a928b49bbf2e5a5f6af6facd7349d0cb3b3b63000e6cfaf44
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.5153

Heuristics 4

  • 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 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
  • 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://seumenha.ru/award?keyword=ejemplo+de+una+acta+constitutiva+de+una+empresa+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495550/normal_5ffb3d9a02d93.pdfIn PDF document text
    • https://rosavipufek.weebly.com/uploads/1/3/5/3/135315232/tofavanofe.pdfIn PDF document text
    • http://goxezidoge.22web.org/jawazifusibakozitufada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498842/normal_604ab84a52b8a.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/IghhHHu/new_york_city_sightseeing_hop_on_hop_off.pdfIn PDF document text
    • https://wulapoledonuker.weebly.com/uploads/1/3/2/6/132695240/6596651.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/n5jcibN/nilutimip.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/tarixuremalazobise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_60181bcb82f3b.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/hgcib7p/bovavina.pdfIn PDF document text
    • http://copyrightreports.com/91249948374ymzb4.pdfIn PDF document text
    • http://hardcreditcheck.info/44289233862o0vrr.pdfIn PDF document text
    • https://moninedowilex.weebly.com/uploads/1/3/1/4/131436981/7640265.pdfIn PDF document text
    • http://hamlikjorettoop.ru/what_are_the_duties_of_a_preschool_teacherykmby.pdfIn PDF document text
    • http://talkme-news.info/iec_61010_1ty6r4.pdfIn PDF document text
    • https://berebexamoleti.weebly.com/uploads/1/3/1/3/131384136/9002450.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/ilifLjj/define_the_managerial_revolution.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/gghaejf/stickman_base_jumper_2_hack_apk.pdfIn PDF document text
    • http://fruitslope.online/gilgamesh_herbert_masonttiir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486363/normal_5fe63ad99a9c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_602782d422fc1.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/ad84935d-668d-4398-9d80-08fe1cd4edf7/37030012718.pdfIn PDF document text
    • http://rorodev.rf.gd/how_to_find_your_dd_alignment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8062e5da-16db-4668-945b-66a8b7b9b9ca/22318404292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d36b09-4a1f-4789-8803-11c1d7eb5bdc/ameristep_2_man_ladder_stand_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ff31bd-f57c-4095-8fa0-cbaf562bbbf3/vizio_model_e48-c2_user_manual.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 5392 bytes
SHA-256: 742ce97f1687e5be9f4978c50aaa05177cf196797e1fc6fc068b09e95e74668d

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