Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca2c0b7c8f1618a…

MALICIOUS

PDF

73.5 KB Created: 2021-03-16 16:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d1dca7f39bd81a4d97d9813b70cb5017 SHA-1: de2fe005b2038f3d6585e29be709c0513b6813db SHA-256: dca2c0b7c8f1618a49909de759c8accd90df008efc7678bc151f247e99b1c3a6
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 0.9997

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://xajibur.ru/123?utm_term=american+football+jersey+template PDF link annotation
    • https://nelubetif.weebly.com/uploads/1/3/5/3/135322580/13364aa43ebc4.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/jjjdINo/dragon_quest_viii_descargar_para_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/mizogujuzo/dgeJsve/abstract_live_wallpaper_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408976/normal_602b98ccee24c.pdfIn PDF document text
    • http://mizusugazalu.22web.org/44381369809.pdfIn PDF document text
    • https://xexewevifiwewol.weebly.com/uploads/1/3/6/0/136054804/5579837.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444095/normal_5ffd7cd276073.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/gfhfvib/54558394487.pdfIn PDF document text
    • https://cdn.sqhk.co/jagugide/jbhahhe/jedazuzivisegupeti.pdfIn PDF document text
    • https://junezemojevav.weebly.com/uploads/1/3/2/7/132740237/17878c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412394/normal_5fcb3377bc605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_60180828339c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5fdde9c377da1.pdfIn PDF document text
    • http://pewodaz.22web.org/40759262955.pdfIn PDF document text
    • https://rakuwogu.weebly.com/uploads/1/3/4/8/134858672/zuzivodagu_mimolal_radubof_dujulagezaxal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_7df178ba4d754fada099f18e7027c8b5.pdf?index=trueIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_05e88c18529344a680a4bc86ab77b5c4.pdf?index=trueIn PDF document text
    • http://sovizaz.epizy.com/99268306011.pdfIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_b89fd5f05a694acea349cb4e9c5fa68f.pdf?index=trueIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_f6be3e7d07d94de5869680d98775c788.pdf?index=trueIn PDF document text
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_7d30a78a0e7344bf96f5a48db43a00d3.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE247 5468 bytes
SHA-256: fd7699359bf0862c3df6378c4b5e429f6bfe1d291e1a149b99fe63c12e4d812d
font_01_sfnt_off0000f4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D6 10660 bytes
SHA-256: b2db7a0ab1a18d1cdddf9a86e535c2d534b1674afd716659df4b25971659c96e

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