Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e8458b82669af4…

MALICIOUS

PDF

70.6 KB Created: 2021-02-12 04:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 15713b517d937bb18c103bd36d21a2b4 SHA-1: 68e662cbd9aba4701a5988eb8864b6b0e0f92b53 SHA-256: c8e8458b82669af46366cc74f086ca916b118e81b828db14dc98b863448137bb
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/wix?keyword=phoneme+apk+free+download PDF link annotation
    • https://cdn.sqhk.co/novitovikor/F6hh4HD/sudoku_solver_3x3.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/eOgf7jb/sezopuwuv.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/RgehfUh/guide_for_super_mario_64.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/jbiiWha/hell_rider_movie_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/pomisiforuko/hatggjc/38822298098.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/3ieJovi/scary_ringtones_for_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xeviremal/fT1jad2/3888669683.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/jahjc4v/crowd_control_score_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/jjol98E/rope_hero_3_mod_apk.pdfIn PDF document text
    • https://denoxexulove.weebly.com/uploads/1/3/4/4/134457588/f7b03180cea59.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/cjehbFa/54193989615.pdfIn PDF document text
    • https://rebeluzibefu.weebly.com/uploads/1/3/4/6/134619862/puwegugesomejurupo.pdfIn PDF document text
    • https://cdn.sqhk.co/womibakok/fyjdjjA/3761836362.pdfIn PDF document text
    • https://cdn.sqhk.co/kipezipilojo/gcgegj9/amazing_facts_ministry_app.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/t34afgi/44401953452.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/ccG2hfD/46373634915.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/ngcKjaf/49150742576.pdfIn PDF document text
    • https://cdn.sqhk.co/zezegawutogu/hgeihSL/really_weird_human_body_facts.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/iUCgcv6/gifegasip.pdfIn PDF document text
    • https://cdn.sqhk.co/vofaruvukuk/erhhihw/75572347576.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DB 5260 bytes
SHA-256: 0aaf8509a117f8abfb5ee64503df57f9cbfe4fbf5e685f007b0e449d8420186a
font_01_sfnt_off0000e4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A7 12656 bytes
SHA-256: 0fb33dd89619a552227e07cd24096140b86208f5e7ed9262ead4ca1403bf44af

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