Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b894b82daf6d5b9…

MALICIOUS

PDF

81.2 KB Created: 2021-05-11 00:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8d43c3792421719bb298d53d92faa8fd SHA-1: c6d28cb608fb7ee51854d67474f829e636c5ec74 SHA-256: 2b894b82daf6d5b99432a540993f1fd7494c6da40efd372164c8b4114da4fcd0
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 0.9998

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://jottigo.ru/strik?utm_term=color+theory+art+lessons+for+middle+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420902/normal_6034ea67025db.pdfIn PDF document text
    • https://jafusakivamo.weebly.com/uploads/1/3/0/7/130739280/wanaj_xigidapixozop.pdfIn PDF document text
    • https://vugijivanapuxa.weebly.com/uploads/1/3/4/7/134742443/8491757.pdfIn PDF document text
    • https://cdn.sqhk.co/rajexizeba/WMHVD8h/diversity_jurisdiction_examples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418175/normal_605703a202070.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/hcc8jfs/tisomuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401517/normal_6016e2f32615c.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/3Shihd5/wifi_hotspot_driver_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/hdhgh1Y/usj_community_forum.pdfIn PDF document text
    • https://cdn.sqhk.co/mivadunoxo/BnSsrib/19071520093.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepavipa.epizy.com/83614890636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3019f5d6-14a5-4053-8a0d-008cdb1d5bc4/86770811452.pdfIn PDF document text
    • http://famuxixisuxu.rf.gd/jurnal_bronkopneumonia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc2ca1c9-8566-4402-9693-763b51a6ff32/blackdecker_bdccs20c_20v_max_cordless_circular_saw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/781dcefe-9c8d-4137-86b2-2382805b2e58/does_a_duffel_bag_count_as_a_carry_on_spirit.pdfIn PDF document text
    • http://volitig.rf.gd/35311762407.pdfIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_4e9befab5fcc4e519477583d44c7ad50.pdf?index=trueIn PDF document text
    • https://7a48fde5-f9d1-4ce4-84a2-8b156d245d18.filesusr.com/ugd/8127dd_4c83de92dff64996babd058561c29ca8.pdf?index=trueIn PDF document text
    • http://detotoga.epizy.com/lesiwur.pdfIn PDF document text
    • http://mafolizol.rf.gd/8128739882.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_off000100e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E5 5268 bytes
SHA-256: 6972c9cc3ee4a46e2802705a650828fc8e0cf289623c60d9213442b99ce0a933
font_01_sfnt_off000112a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A9 10852 bytes
SHA-256: 0764817fa891c2c437dae6377c596357758f984e3493bf57b4942aaf48eae28e

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