Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd4ae227ddaed47…

MALICIOUS

PDF

71.3 KB Created: 2021-02-18 09:54:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c1f30badd4f705e6a7e83e5aecc786b4 SHA-1: 5e7f351105ab42da5617d0d5971d4536ff05695d SHA-256: 7bd4ae227ddaed47ec4463014798f28075f7a076da80d97d222c25d9d092a41b
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://yafferge.ru/wix?keyword=carbon+cycle+activity+worksheet In PDF document text
    • https://cdn.sqhk.co/vafegijateno/ibJejhG/kelewerubadabebevujexini.pdfIn PDF document text
    • https://tajuzoliv.weebly.com/uploads/1/3/4/3/134359899/sakukazogazo_bimosu.pdfIn PDF document text
    • http://palitra-cveta.ru/spirited_away_japanese_watch_onlinelqpez.pdfIn PDF document text
    • http://dfwshootersupply.com/raximeganagirevonuwowalcu55a.pdfIn PDF document text
    • http://cupe1.ru/ruzeberabeg35i2.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/bFjePGC/cracker_barrel_menu_with_prices.pdfIn PDF document text
    • http://zakunofukar.iblogger.org/baahubali_3_mp4.pdfIn PDF document text
    • http://arnautmebel.ru/child_care_benefit_formqitzr.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/j2MgjIM/54941312254.pdfIn PDF document text
    • http://tonalemeketav.66ghz.com/weather_report_buxton_derbyshire.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/dhdjcih/wusawufesuvokewiju.pdfIn PDF document text
    • https://pusesame.weebly.com/uploads/1/3/4/6/134662227/7962157.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446035/normal_5feec58394c4c.pdfIn PDF document text
    • https://dosevabif.weebly.com/uploads/1/3/1/6/131637409/xarekifital.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/vuwupode-jelekawasuv.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/bDkdjdm/waravemunozigemuguv.pdfIn PDF document text
    • https://cdn.sqhk.co/lixejudazeza/hhpgMgh/star_wars_space_battle_video_game.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_off0000dc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC58 5252 bytes
SHA-256: 0fda2a249822580eb3f7ec15048e82b1cdb53f9a81031499b043dcbf959ad095
font_01_sfnt_off0000ee43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE43 9868 bytes
SHA-256: fc538dadb57f139533a496d4049e08231e36d0aa7a46c1728d124293c4402330

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