Malicious PDF — malware analysis report

Static analysis result for SHA-256 faec65944c3e024c…

MALICIOUS

PDF

81.5 KB Created: 2021-04-15 23:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ab5db3849d64cfd99d590c5ac59888d1 SHA-1: b132b40949358926a33e66daf4bdc63629103fd1 SHA-256: faec65944c3e024c955fedfe641cac035da5438fee6783a722a977ece9e0e957
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-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/strik?utm_term=how+to+use+sodastream+sparkling+water+maker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474211/normal_6042f0a930a3f.pdfIn PDF document text
    • https://cdn.sqhk.co/lovaxixifew/hjIicRF/xetanivigowubiwab.pdfIn PDF document text
    • https://cdn.sqhk.co/raninogozo/KQhjihv/fadijafelomonov.pdfIn PDF document text
    • http://jidogirikar.mygamesonline.org/wuvopazigejabezavobakejed.pdfIn PDF document text
    • https://cdn.sqhk.co/jimikafede/jdigiiQ/ibis_paint_brushes_for_skin.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/ge0TMgf/60502832024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462379/normal_606e52d556132.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/45231872142.pdfIn PDF document text
    • https://cdn.sqhk.co/dawolesirip/hYUgfid/drawback_synonym_crossword.pdfIn PDF document text
    • https://cdn.sqhk.co/pofoxubo/IhiThab/judel.pdfIn PDF document text
    • http://sopafekidis.sportsontheweb.net/lusipazugufiwozemeguta.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/j4hcaih/followers_likes_for_instagram_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/nazewetekelikisuw.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/joined_up_handwriting_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/15002828202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453e8902-4c95-4226-8666-0f8478cb7ff4/belonerumikonidomitebawag.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/vuralatinavupija.pdfIn PDF document text
    • http://sizemogigu.myartsonline.com/physiology_book_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88ce002b-c909-498b-83f3-85905a84be0f/fomukunewapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdef61c7-7326-46f4-b563-fb417315ee35/wosaxiwuvuxefam.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/62426132659.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_off00010122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10122 5396 bytes
SHA-256: 75b0d2a3cf83066c6b221a07d91860c1c919851bff58e9a0acafa5b4528edaed
font_01_sfnt_off00011379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11379 11388 bytes
SHA-256: 842a0e6c082bc01f20c30a0b9d3dd03a5c7570a2f755b02d7133f1ad78c0a74e

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