Malicious PDF — malware analysis report

Static analysis result for SHA-256 df62ad5ba91461c3…

MALICIOUS

PDF

69.3 KB Created: 2021-02-25 00:24:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: eb4d8cb2cb747ef65515321c7ceb5203 SHA-1: f0481320b00a93237f9a02b1ccad24146f839851 SHA-256: df62ad5ba91461c304de71e3aaaebb47a26cc1230317b32763214fa3cfaae9bf
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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://crophysi.ru/award?keyword=authorized+whirlpool+repair+near+me In PDF document text
    • https://cdn.sqhk.co/wemitupu/bkifruc/3038148891.pdfIn PDF document text
    • https://cdn.sqhk.co/woxutonezem/jgwhfij/90249895186.pdfIn PDF document text
    • https://pizakatunif.weebly.com/uploads/1/3/1/8/131856177/rexuwupaw.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/hmFrhdP/cyborg_photo_editor.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/ihhGiFX/magic_tiles_3_hack_apk_download.pdfIn PDF document text
    • http://familyit.pro/dofilosx31z7.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/jdhd1Ah/jazulinuzipakutelobe.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/Khhhaib/xotexibanejosan.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/dVypUjb/29420902709.pdfIn PDF document text
    • https://cdn.sqhk.co/zujagepax/wptkicZ/tmnt_mutant_madness_how_to_switch_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/Xgif9gZ/17046419686.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/hgi9yFE/walking_dead_game_road_to_survival_cheats.pdfIn PDF document text
    • https://fojomuku.weebly.com/uploads/1/3/4/4/134447263/9138553.pdfIn PDF document text
    • https://cdn.sqhk.co/lediname/YS02jfJ/the_art_of_war_book_review.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_off0000d36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36B 5152 bytes
SHA-256: 30bdee6e26bcd19c214560a2fdcde10656e59a47bfdf1a12b66785ae4ffadda5
font_01_sfnt_off0000e4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DC 10440 bytes
SHA-256: 60d936dbb791d173fe814582f3b42574e3c2e788d1b2fe91df66803b163fc990

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