Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca11252be4ca1d46…

MALICIOUS

PDF

81.2 KB Created: 2021-02-25 04:17:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: 94c9dc420ac70284c7a3937205e14c9d SHA-1: a3775acd23757efc8a15758f71d076bf13419c0f SHA-256: ca11252be4ca1d4686a8853be37a2154a68e2076b1c5f28edb56393d4b9f36db
196 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
  • 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=the+blind+side+movie+storyline PDF link annotation
    • https://cdn.sqhk.co/towevefizub/gcA7Mbf/subilokazaze.pdfIn PDF document text
    • https://vojanaxopij.weebly.com/uploads/1/3/1/4/131453451/penufile.pdfIn PDF document text
    • http://niginotan.22web.org/alnafitha_international_for_information_technology.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/84005993766kvgqp.pdfIn PDF document text
    • http://gukazuz.iblogger.org/27086923258.pdfIn PDF document text
    • http://findssldz.xyz/green_bowling_tips_for_beginnersh7hw8.pdfIn PDF document text
    • https://tirokaroxere.weebly.com/uploads/1/3/2/7/132740449/buvunisewovowekateku.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/9fb299ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fimuwudefixolet.epizy.com/braun_series_7_790cc_electric_razor_review.pdfIn PDF document text
    • http://pamakejexo.epizy.com/ganulepodu.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/64166181925.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/42493862252.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/fixixim.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/love_story_music_notes_piano.pdfIn PDF document text
    • http://sowujakuje.rf.gd/state_newtons_universal_law_of_gravitation.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_off00010221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10221 5104 bytes
SHA-256: 2b4523b7cfccdb5fb7510af52334f94f98674ad15bfe9fbb168ea490f94da8ea
font_01_sfnt_off0001135a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135A 10704 bytes
SHA-256: d4ae589e175412de5d6ee002740ddf9941244cae8f3bb774bbcc78cca4b34ccc