Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b2e6565bedc831…

MALICIOUS

PDF

70.1 KB Created: 2021-02-24 05:38:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bad24b7400d880ab1631ad7c808821dc SHA-1: 9f4cd5cabac2c9a605d77090aa262f5b87d201d0 SHA-256: 35b2e6565bedc8313dc4bd81af69be3e9e8c0d312791e35c2e5f8a6caeca1cfc
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://druttle.ru/wix?keyword=ap+chemistry+zumdahl+7th+edition+answers PDF link annotation
    • https://cdn.sqhk.co/woselukafo/cgfjfhg/zombie_island_movie_2014.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/jchDagi/ledukixutesararenezuxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457582/normal_5fff4186949ef.pdfIn PDF document text
    • https://dakesepev.weebly.com/uploads/1/3/4/3/134308776/6023391.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/dHp9Wgc/gowomexifotaviwutokibejer.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/bhdzhic/construction_assistant_project_manager_jobs_houston.pdfIn PDF document text
    • https://cdn.sqhk.co/guxifunuris/drxijgb/heritage_auctions_nyc_office.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/GhfOtgy/dagabafilivilunisotabowas.pdfIn PDF document text
    • https://cdn.sqhk.co/pejozujemu/jahjcic/top_speed_formula_car_racing_game_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/rhdgcoV/88824893235.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/ejeSdd8/9328374073.pdfIn PDF document text
    • https://kaxojolomo.weebly.com/uploads/1/3/4/8/134885197/00c4de6648.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420030/normal_5ff59bdc29724.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tubupejevomo/diet_for_blood_type_o_positive.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC972 5508 bytes
SHA-256: d162659f1555dfd7e3458770911e5aed47c4670746256c8b4263723bb4699a1a
font_01_sfnt_off0000dc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC23 9696 bytes
SHA-256: b0505ff8619f4e0486ba68708710a4acbedb170185cc4a3feca0bb7c647105d7
font_02_sfnt_off0000fd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378