Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f47664b897fcf2…

MALICIOUS

PDF

76.3 KB Created: 2021-04-25 04:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9b298e9da21834373c5ac80d080e79e8 SHA-1: 193f479a22206a03a75b032e49a3cbe39612ffd9 SHA-256: 72f47664b897fcf2d63bffaf5aa44c62bf3826d6f120605d211d7b4ec1c36dff
126 Risk Score

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://vilenefex.ru/strik?utm_term=the+secret+history+of+wonder+woman+book+review PDF link annotation
    • https://cdn.sqhk.co/penunotati/gjficid/mobile_legends_adventure_codes_sept_2020.pdfIn PDF document text
    • http://maxovulosaxa.22web.org/john_deere_d110_riding_mower_tire_pressure.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/c6Gjaia/sekelevinigoti.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/j1nXDja/amoksiklav_zawiesina_ulotka.pdfIn PDF document text
    • https://rasiwumuseb.weebly.com/uploads/1/3/5/3/135350461/5580061.pdfIn PDF document text
    • http://nikifumik.22web.org/donosenuwukiw.pdfIn PDF document text
    • https://sedugewevazan.weebly.com/uploads/1/3/4/2/134234752/lamevurinuji.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/phbqjcB/jeginamepesolikasej.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/2Lgijd0/fosidipawa.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/Cibge3Y/solitaire_ring_with_thin_diamond_band.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/0cf8df26741.pdfIn PDF document text
    • https://cdn.sqhk.co/xakalodesi/vghu4th/ultimate_dinosaur_simulator_apk_hack.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/pibabopuduj/62103061551.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/authorisation_signatory_letter_format_for_gst.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/monopoly_rules_rent_while_in_jail.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/kannil_theriyum_kathaigal_tamil_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/jarakixamijopaxokemukerib.pdfIn PDF document text
    • http://zugozabo.epizy.com/il_canzoniere_saba.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_off0000eb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB14 5636 bytes
SHA-256: caa15dc5e30dc6e72c31db93f723a0e5d5bbef3e6cb53f041d6889e23a74d789
font_01_sfnt_off0000fe2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2D 10920 bytes
SHA-256: e65ebae0691c3ce99479ce2a4b9058265d17d684a758ce546c0e40ebf1c4893e

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