Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64afef2dde0f30f…

MALICIOUS

PDF

74.5 KB Created: 2021-04-18 10:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 81ec7496ee005785c36176443f09a22f SHA-1: 9e8f68abb03233d0b06f3055a02da987d2064a8a SHA-256: d64afef2dde0f30f1846d8bd54e16e78d2f9b3c678e219f5f87efa95e1829eac
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 0.9996

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 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://maypoin.ru/strik?utm_term=what+to+do+if+your+puppy+shows+signs+of+aggression PDF link annotation
    • https://dogewirezuv.weebly.com/uploads/1/3/4/6/134699505/fapudawakewub.pdfIn PDF document text
    • https://cdn.sqhk.co/nadovexum/UhcKcgf/nimoboride.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_5fd68bda1e3d0.pdfIn PDF document text
    • https://rebopugosoge.weebly.com/uploads/1/3/5/3/135346619/sifapex.pdfIn PDF document text
    • https://bumipavadawafez.weebly.com/uploads/1/3/2/7/132710759/7231216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428052/normal_6046682aca211.pdfIn PDF document text
    • https://cdn.sqhk.co/silakozafi/yidhxia/fizusizudirari.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/CUhegjr/99756167528.pdfIn PDF document text
    • https://vesetiwavulajed.weebly.com/uploads/1/3/1/3/131381055/bipakofijif.pdfIn PDF document text
    • https://vogavova.weebly.com/uploads/1/3/1/6/131606390/jigux.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/kikunojulejuj/computer_programming_schools_in_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/top_10_warship_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/81535557267.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/jpcsp_psp_emulator_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/71506872282.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/auditorium_design_details.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/dragon_age_inquisition_guide_mage.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/1877595847.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/durable_power_of_attorney_florida_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/59249770424.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/89860419506.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_off0000e616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE616 5480 bytes
SHA-256: 2895965dd4730c3b540a38c8d6d7d9d70555391498f86c2ab924890798843552
font_01_sfnt_off0000f8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DA 10268 bytes
SHA-256: b036f20e59cfea56c9278e66bc4375f5b329a2e3e53ed049a1f4507eec97d3ae

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