Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78cce2b508318b3…

MALICIOUS

PDF

72.9 KB Created: 2021-02-25 09:23:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 33dcccd0a09d0969c9d862883b63a999 SHA-1: 563813421ce75c6ab99825815879a9c7a70f8c41 SHA-256: e78cce2b508318b3c78fe3ee4b40813e1a6e1c53011753bce86d8ce7f24c83ca
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://bologen.ru/award?keyword=my+iphone+says+my+icloud+storage+is+almost+full PDF link annotation
    • https://medimigo.weebly.com/uploads/1/3/4/8/134864966/tofil_nisuzirumow_kusekafesifonik.pdfIn PDF document text
    • https://vetebifarex.weebly.com/uploads/1/3/4/0/134016991/5cbc585c2.pdfIn PDF document text
    • https://cdn.sqhk.co/jujegopenop/5vDMPUj/athletic_clothing_wholesale.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/mefovu/aquamarine_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/fewudoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/sql_server_functions_cheat_sheet.pdfIn PDF document text
    • http://basapixukeg.rf.gd/63770351387.pdfIn PDF document text
    • http://defipezisezujor.rf.gd/lezevotij.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/gipusasukodavi.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/pibazunafexosovigezo.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/how_to_connect_wireless_turtle_beaches.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/free_printable_auto_repair_order_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/83158573321.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/25075235084.pdfIn PDF document text
    • http://mukonedes.epizy.com/fagobibixotipopuramu.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_off0000dea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA4 5676 bytes
SHA-256: a55a18e439150804b2054066ab90b13fdf33e38cb753078f43e2947a9afd4e92
font_01_sfnt_off0000f1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DF 10796 bytes
SHA-256: b7534cd36101c043011d1fe07e32cf203233b0587a7f6e57762953dfb0dca07f