Malicious PDF — malware analysis report

Static analysis result for SHA-256 9255aa000b5a8071…

MALICIOUS

PDF

70.0 KB Created: 2021-02-28 09:29:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f401ce19982acdb190409e6a77e7fe4a SHA-1: bb2e0442bfca470777880206bf2fe00bacb418f4 SHA-256: 9255aa000b5a807149a7b823db4d3f0c88a6612c8bec7172a64ac244c7e5d16a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=is+iatf+id+still+valid PDF link annotation
    • https://magenudelekoj.weebly.com/uploads/1/3/5/9/135975171/0ccc470815376.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/6081403.pdfIn PDF document text
    • http://tasunixupowife.66ghz.com/trileptal_dosage_forms.pdfIn PDF document text
    • https://xibatelilon.weebly.com/uploads/1/3/1/6/131637149/8597793.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzezajolu/dbUlaic/cuban_missile_crisis.pdfIn PDF document text
    • https://laxuwipulave.weebly.com/uploads/1/3/5/9/135956831/mokitemuxixijakepar.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/Wfgf8ji/fish_sandwiches_near_me_that_deliver.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/ropidadegaxut/kadhalithal_anandham_video_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/gameboy_emulator_games_free.pdfIn PDF document text
    • http://lovagijikem.epizy.com/mapigevutozan.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/how_many_calories_in_a_turmeric_latte_with_oat_milk.pdfIn PDF document text
    • http://xenivut.epizy.com/18617858770.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/africana_womanist_literary_theory.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_off0000d8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D8 4804 bytes
SHA-256: dbdcbfa5b442ccf22fb1105245f43b29fcf3550109cdc88d194732f5503d3f98
font_01_sfnt_off0000e948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE948 10032 bytes
SHA-256: 9702c8154cb3e8a0a0cb399f6cdb513da92ebc1dfb6f845668a00688d0fae173