Malicious PDF — malware analysis report

Static analysis result for SHA-256 904236aa7a66690c…

MALICIOUS

PDF

91.0 KB Created: 2021-04-06 11:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a3b334296c1aa381777685bdc58d18ad SHA-1: 1025dfb076fbe316cadad1b7488a7892ba32b82c SHA-256: 904236aa7a66690c22199bc780334309863cff20dc477d725c4de5e43c6baab3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

Heuristics 5

  • 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
  • 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://pelibifir.ru/123?utm_term=afghanistan+economy+2018+pdf PDF link annotation
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365638/normal_5ff8107cc7525.pdfIn PDF document text
    • http://femonejigajape.mywebcommunity.org/was_the_book_of_enoch_in_the_original_canon.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/briscola_regole.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5fc6e0969a3d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_60635a086fd75.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/vapixutokumasovuwopu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425487/normal_6004da1f31754.pdfIn PDF document text
    • http://tomogorman.com/residential_lease_cancellation_form_texasf24fj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470975/normal_6054b9d756dae.pdfIn PDF document text
    • http://dmdmassage.com/67670768941wpth4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475859/normal_603c0b1b50582.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485443/normal_5ffe0dc8f23ba.pdfIn PDF document text
    • http://zonojebiridizo.mywebcommunity.org/32044746078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475216/normal_5fe13637e11c5.pdfIn PDF document text
    • http://xakidofe.sportsontheweb.net/list_of_healing_scriptures.pdfIn PDF document text
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/jofuwixaver.pdfIn PDF document text
    • https://sapefesoj.weebly.com/uploads/1/3/1/4/131453354/cfcc6d3b3b.pdfIn PDF document text
    • https://xawawamofolapus.weebly.com/uploads/1/3/1/4/131436997/tulifesezeduzaxeb.pdfIn PDF document text
    • http://mobile-media.moscow/present_perfect_continuous_exercises_eslz9otq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401989/normal_60625afd5e081.pdfIn PDF document text
    • http://klokisik.space/129769840qszvv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://paguxesij.myartsonline.com/fender_twin_reverb_65_reissue_for_sale.pdfIn PDF document text
    • http://zavulelobawabi.onlinewebshop.net/51987394445.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

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_off0001251e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251E 6052 bytes
SHA-256: 57b6fdd7d99aefae747a379d020bc4021caa3139f43068010dd2d6911bb6d88b
font_01_sfnt_off000139ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139AD 10760 bytes
SHA-256: 4d1d20ddf1b63664e58b90b2fa8795e05c430522365a3d5427794391f60ca3ec

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