Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f684238f46a1a60…

MALICIOUS

PDF

74.7 KB Created: 2021-02-14 05:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e320756320028753609a84b3137673b1 SHA-1: 30080b2316e0cb93ab69537b593bb5d49d62ab6a SHA-256: 2f684238f46a1a60e90c628a03d73c2b4ea1fa8793b979b036714ef4736c91f1
254 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
  • 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://yafferge.ru/123?utm_term=swelling+after+rabbit+neuter In PDF document text
    • https://static.s123-cdn-static.com/uploads/4418963/normal_5ff05f689adb0.pdfIn PDF document text
    • https://fogunovavak.weebly.com/uploads/1/3/2/6/132681822/subaneduxajo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383314/normal_5fdda919c5588.pdfIn PDF document text
    • https://jazediwugitali.weebly.com/uploads/1/3/4/7/134730671/96c3a61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462065/normal_601fe11471db6.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/bhfgeNg/frankenstein_meets_the_wolfman_cast.pdfIn PDF document text
    • https://linajijokib.weebly.com/uploads/1/3/4/0/134000065/fubexodupesawuduwup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477658/normal_6001ddfc6940e.pdfIn PDF document text
    • https://lalusaguru.weebly.com/uploads/1/3/4/6/134611329/9874600.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tovujopojat.epizy.com/baveniwawaxiwenov.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/kerafowali.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/free_video_er_freemake.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/99360379875.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/audacity_windows_10_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/zogopodaves.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_off0000e850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE850 5092 bytes
SHA-256: 468fb87ce79cb88dd466442417d64f02aef120cdc1ea4eb2bef3725fde47c11c
font_01_sfnt_off0000f9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CD 10756 bytes
SHA-256: ee6a40fc928ccfd3d12c29195abbe9f20eded42c1dee862c30b828f0066ec383