Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2715ad8c1f8976f…

MALICIOUS

PDF

75.9 KB Created: 2021-03-11 21:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b1a6e0bbdd94c376e2c890fe168ee321 SHA-1: 12acc4cca1b8d9f97251e85c8a8c12f0244d7996 SHA-256: e2715ad8c1f8976f7d94ae5fd5363f85b24fb32786cf4ab5c1854c25e86b8138
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://golowaki.ru/award?keyword=bbva+api+market+pdf PDF link annotation
    • http://rineset.xyz/fibitugured5top6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486982/normal_5feddf018e447.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/jchgjgM/thoracentesis_position_dog.pdfIn PDF document text
    • http://donbetosstreettacos.com/entrepreneurship_theory_process_and_practice5s3ji.pdfIn PDF document text
    • https://cdn.sqhk.co/gagowuname/hjZkRWx/56044526717.pdfIn PDF document text
    • http://ig-copyrightviolation.com/91977903200vvnzy.pdfIn PDF document text
    • https://cdn.sqhk.co/kabawamurelo/gfEgdJz/ghost_in_the_shell_anime_4k.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/YbHnEpf/xamafapo.pdfIn PDF document text
    • http://br1.red/xupuwefujil1mix8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_6031c827d4028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486963/normal_600dffcd7c72a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_6014913edbdff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_9af343edeb1442f692a94ecbb68fad3b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7239da14-14f4-4788-970c-99e94aa2ff9a/95202699269.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/find_doi_in_sci-_hub_extension.pdfIn PDF document text
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_b92ee597c620421a85cfafaf1ada5e93.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/brahma_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f0340b-4c42-4dcd-9694-34df3f2250a2/64360406198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f5942c6-7e37-4870-8082-5c8b07558fd4/directv_music_channel_list.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_a11e612011bb46be8346bb1614d08837.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED27 5288 bytes
SHA-256: 809a52ce0f6a1ddfdca2db4cb3e039fed0efd98653b15da55676700bf78d58ed
font_01_sfnt_off0000ff18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF18 10488 bytes
SHA-256: f01f0d933c5eb848d2aeb324f2222e7f4d9a31b37225f7040792eaeb6c1d5e73

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