Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c891ba7158f084d…

MALICIOUS

PDF

87.3 KB Created: 2021-03-15 14:50:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 76b2d052ce89fa1ada2a7129e31a4b6c SHA-1: 103e202d3f40ddde7c1ba64f63c24ece03cbc8de SHA-256: 2c891ba7158f084d417b6e0766402b558c42f29b2a843d05f0526c0ae4dd72d9
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=monkey+go+happy+2+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384472/normal_5fd047d2e84f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388629/normal_603fd601b526e.pdfIn PDF document text
    • http://lg-copyright.com/callie_from_the_fosters8qj6p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_60357d211286f.pdfIn PDF document text
    • http://bikokobolo.sportsontheweb.net/how_old_you_have_to_be_to_get_ssi.pdfIn PDF document text
    • http://fajamad.mypressonline.com/beyonce_crazy_in_love_lyrics_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413002/normal_5fdaaac1a00b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386830/normal_5fdef99f794f9.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/talawaxaretamitemewo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481162/normal_5fe6885c1ec3f.pdfIn PDF document text
    • http://ritegifufefut.scienceontheweb.net/8th_habit_from_effectiveness_to_greatness.pdfIn PDF document text
    • http://allwoman.site/consumers_report_magazine_subscription_canadapuxtp.pdfIn PDF document text
    • http://naturebiolog.fun/3345234010885v5g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459805/normal_5ff7e233af22c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_5fd13bddc6415.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/lg_sw_440_gr_g2.pdfIn PDF document text
    • http://wiinorama.website/47037736781i4roi.pdfIn PDF document text
    • http://ludshop.xyz/vukobz2t74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vifidumefitur.atwebpages.com/nawoxibiwugabipoguligofa.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/xiaomi_mi_9_se_update_android_10.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/juneduramijulukefoxal.pdfIn PDF document text
    • http://xifeloj.onlinewebshop.net/47949123461.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/differential_optical_absorption_spectroscopy_principles_and_applications.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 6

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_off00011081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11081 5444 bytes
SHA-256: 8987e900af93a308c2b6b8c479c499b96ce85aecf64ed41737bc5b16c835d382
font_01_sfnt_off0001232c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232C 13736 bytes
SHA-256: 14ad0d3052acb622789b387198bf037339b490b155e3dd9250169f4e5ecc3521

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