Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe3c099d93383fc…

MALICIOUS

PDF

71.3 KB Created: 2021-02-24 14:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8315ca357a32bc5793d4ea7c71867409 SHA-1: 9c338689f97dec90299be3084e818b513b1e49a2 SHA-256: dfe3c099d93383fc20c200cd3a763523c07a1f5673c45a6bec798f2704b0e0ba
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://jacksth.ru/123?utm_term=samsung+hw-h550+power+adapter PDF link annotation
    • https://cdn.sqhk.co/poronujefino/iWzhjdz/candy_corn_design_fabric.pdfIn PDF document text
    • http://localdesign.me/after_we_collided_full_movie_uk_youtubemqvpe.pdfIn PDF document text
    • http://afracheat2.xyz/27794974795p7676.pdfIn PDF document text
    • http://deemonatrafik.xyz/livuxukitixadugobemabonywph2.pdfIn PDF document text
    • http://salebox.shop/3.5_familiar_guiderce4v.pdfIn PDF document text
    • https://cdn.sqhk.co/noxutuvixi/fjd7jdi/lejewuguzewuzexugam.pdfIn PDF document text
    • https://cdn.sqhk.co/keliziniw/cd0eghJ/13385149693.pdfIn PDF document text
    • http://disconto50.pro/natuladosumedojisue50d.pdfIn PDF document text
    • http://zupinuxuxodu.iblogger.org/scoundrels_full_movie.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/pasawexawinogad/chess_live_game_app.pdfIn PDF document text
    • http://gawekavadave.epizy.com/femikifigenajubuka.pdfIn PDF document text
    • http://junenizexi.epizy.com/pafepoz.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/avg_antivirus_pro_android_security_free.pdfIn PDF document text
    • http://limufewugewo.rf.gd/27221114902.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/arnold_song_whatsapp_status.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_off0000cfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC3 5836 bytes
SHA-256: d7f99b1126b510255712aaeaefb9e1b809b1eb1b0ee34d3b2a589f88582c6e49
font_01_sfnt_off0000e389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE389 13428 bytes
SHA-256: c1640f029c8c1e2bb0cd0fb407828c1cc1913784c19ae58e6b42b2e942e9997d

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