Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0ce2e09c40b994…

MALICIOUS

PDF

77.9 KB Created: 2021-03-23 23:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 32aa5ddeb21b08d3047b57914cca3917 SHA-1: 48def741e3cec423b11e79f5c4757d805554677b SHA-256: de0ce2e09c40b9940c6187b46ddb71b74b5a12bfe5d3bcdf103357313664cb88
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 0.9996

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://mezovuduw.ru/wix?keyword=weather+instruments+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369168/normal_605704fecb9e3.pdfIn PDF document text
    • http://moneymaya.site/the_hobbit_3_full_movie_in_hindi_download_720p_worldfree4u3g9bs.pdfIn PDF document text
    • http://oneplusonemain.xyz/65656979150irjtn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424981/normal_5fd14e4f850a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443815/normal_6004cc6c58a1b.pdfIn PDF document text
    • http://mastericy-chistoty.ru/47112565662ciid0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_601f0227748c0.pdfIn PDF document text
    • http://studytogether.fun/xaxopetuwixugunutobegoejypf.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/67335776617.pdfIn PDF document text
    • http://wudaxozibutix.sportsontheweb.net/sonibamem.pdfIn PDF document text
    • http://mantenancie.com/69348837705pol15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464529/normal_60224db09d135.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/dry_augusten_burroughs_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_2769a507a32840eb940f74fd46d89c80.pdf?index=trueIn PDF document text
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_25947ab84d2a4c10adec046e9a9c629a.pdf?index=trueIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_3af779036e73454cb67ecb9bc3c2e295.pdf?index=trueIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_e36ca489c2844a15a0cd602eaee94d28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c2329d-1df5-4510-8edb-482eee66eaf7/mifoluravub.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/61467939666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be525b83-5055-4f70-b57a-38c89b0c92d3/3906551824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75c92d0-62ef-40a6-a131-82ac28dbe571/naxuxadujamavevonumew.pdfIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/bowezojo.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_off0000f3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C9 5060 bytes
SHA-256: d61d8bb25e0503d65028021b3089bf4fd23210a6e542aa820866d800423acd6e
font_01_sfnt_off000104e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E9 10936 bytes
SHA-256: fd3231c360c27588027bced0f8a2a8af3cadc55e12c22bb83d9bf302bdd4175a

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