Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bf9314efdbe0fc…

MALICIOUS

PDF

77.6 KB Created: 2021-05-02 15:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 31a96819451077fefcbd1a336f819825 SHA-1: e76149b98ba24618935fb481cba5f004bdfbf458 SHA-256: 75bf9314efdbe0fcad0ffb9f032cf9e545f2a0c1e30f035d3b5fba29df52d767
156 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 0.9993

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 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.
  • 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://fokemale.ru/strik?utm_term=oracion+para+invocar+al+espiritu+santo+de+dios PDF link annotation
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/parera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499673/normal_60299154a33d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_60249b4bd3eb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_60178a2a543b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408170/normal_5fe454ded672a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367624/normal_5fecadc3c37b9.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/1hfhhjf/hide_and_seek_guide_mabinogi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452374/normal_605442589046e.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/djbgeig/the_7th_continent_buy_uk.pdfIn PDF document text
    • https://vemugalibi.weebly.com/uploads/1/3/4/4/134484787/4639680.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/jf9Micf/dead_bunker_2_liter_bottle.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxinugokas/9N3TMLN/pikasarabozaganudoxuteguk.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/Vy6tex5/sukoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_6048508a97f09.pdfIn PDF document text
    • https://bexaxaxaf.weebly.com/uploads/1/3/2/6/132682125/5210779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454047/normal_6062bfe4b5897.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/lorerexeg/antenna_and_wave_propagation_by_bakshi_google_books.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/kapal_fonksiyonun_trevi_forml.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/18522866436.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/multi_arcade_machine_emulator_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/ikea_kitchen_appliances_brochure.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/calico_flannel_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/82420340107.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_off0000f0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F0 5156 bytes
SHA-256: 4dc1c4aa409a6cfa4baf44f977fd810ffac370575fd5965fcb3241f05472c7a0
font_01_sfnt_off00010286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10286 11864 bytes
SHA-256: 603ac88edac4a959f2c56eacb7b3b65a3c0ce764cfa996de8803e3daa5669a8a

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