Malicious PDF — malware analysis report

Static analysis result for SHA-256 13309e2c9053e6c9…

MALICIOUS

PDF

68.8 KB Created: 2021-02-24 19:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 317ae661b1d1da5d344b736a80012e73 SHA-1: ee533e7572d037f27ff71f78521a8eafc36c0273 SHA-256: 13309e2c9053e6c996443c64cb8e34fa3beb127ce5a2d85b8a4674e3ecbf9bff
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/award?keyword=ielts+writing+answer+sheet+pdf+2020 PDF link annotation
    • https://cdn.sqhk.co/zetoreli/dhhhiiM/79002857618.pdfIn PDF document text
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/bixazusukota.pdfIn PDF document text
    • https://cdn.sqhk.co/detazido/f2KKgiP/super_stunt_hero_bike_simulator_3d.pdfIn PDF document text
    • https://tifozofazok.weebly.com/uploads/1/3/1/3/131383738/dinowesage.pdfIn PDF document text
    • https://tapizijivuvol.weebly.com/uploads/1/3/2/6/132696465/maredopew.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/aDii8ii/free_hd_wallpapers_to_download.pdfIn PDF document text
    • https://cdn.sqhk.co/manigonodapu/CccgjOg/corded_beard_trimmer_target.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/Phcigdk/angry_driver_hill_racing_mod_apk.pdfIn PDF document text
    • https://xunuvetokogira.weebly.com/uploads/1/3/1/3/131384336/gojulotagux.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimofaw/DhecgcN/76937462827.pdfIn PDF document text
    • https://nijexenedol.weebly.com/uploads/1/3/0/9/130969845/selupevigeg-dosofinetu-savijafajide.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/fomaralunex/wixawotilegajiledikeno.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/kupoxirelijiju.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/butterball_oil_free_turkey_fryer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/rpa_robotic_process_automation.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/tigima.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/68100991901.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_off0000d0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F0 5608 bytes
SHA-256: fa4da5e384088de98444845aeb6d13b743b9453794151f83b0b664b235fa6841
font_01_sfnt_off0000e40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40D 9884 bytes
SHA-256: a832d62968a647a120d195d59a308ec0630d6efcd1e87d7a11fb44a3eb5f63ff