Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ac8a389fa2b607…

MALICIOUS

PDF

80.9 KB Created: 2021-06-02 04:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a89e76ce8db0a0822d42c98610016c53 SHA-1: d7d886bed4ada4b7247f31480da0ccc569eee82a SHA-256: e0ac8a389fa2b607d44c2b3596e51db026d6a1854720ffb22a2a3483f1a3149b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment 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 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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://lozipotod.ru/123?utm_term=cazuela+chilena+informacion PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408582/normal_60546a7391374.pdfIn PDF document text
    • https://fakebomazeb.weebly.com/uploads/1/3/1/4/131453402/balaboliselaxi.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/325249.pdfIn PDF document text
    • https://gajanokavas.weebly.com/uploads/1/3/4/6/134614817/6710294.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_5ff2bec7891ac.pdfIn PDF document text
    • https://japapitamamevoj.weebly.com/uploads/1/3/2/7/132740309/liseze_saxenuwuzazu.pdfIn PDF document text
    • https://vorujefam.weebly.com/uploads/1/3/4/3/134322124/9a64d64804e.pdfIn PDF document text
    • https://nutuneronasida.weebly.com/uploads/1/3/4/2/134266022/gomamamemevames.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444370/normal_604519c0e21b4.pdfIn PDF document text
    • https://tekipagitew.weebly.com/uploads/1/3/4/8/134871071/ratakebuzol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_60167099c413c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477626/normal_603bad81d9a97.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4391903/normal_60b5225397fb3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gifavipa.pbworks.com/f/2015_vw_passat_repair_manual.pdfIn PDF document text
    • http://liguduper.pbworks.com/f/how_to_digital_planner_goodnotes.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144485124/machinerys_handbook_online.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/w/file/fetch/144485169/five_nights_at_freddys_sister_location_free_download_ocean_of_games.pdfIn PDF document text
    • http://biwonuv.pbworks.com/w/file/fetch/144460053/download_driver_wifi_sony_vaio_e_series.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/f/84542764107.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_off0000fbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEA 4896 bytes
SHA-256: 9f4449006532c00060d9febd919bc4adacb68b20c25a32a9855a66e96e9a9626
font_01_sfnt_off00010c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6E 12532 bytes
SHA-256: a7b5e82ab3395114e63914a241c107aed04636da598f19a094a8f1582c1588bc

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