Malicious PDF — malware analysis report

Static analysis result for SHA-256 797bcf517eb8421a…

MALICIOUS

PDF

77.0 KB Created: 2021-01-31 10:52:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: da1cbe51684f9287ce149d85b68d070d SHA-1: 0c6cc0a5a4e63e2a82ae92be48375e5df1fcb39c SHA-256: 797bcf517eb8421aa123fbd0f387ba5d82f9260e225079f88c6bacf23ab7430d
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/wb?keyword=tanks%20inc%20fuel%20tank PDF link annotation
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/bupumilozafi.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/WhfOpia/21188374521.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/jfgiih0/kufinum.pdfIn PDF document text
    • https://sovipepunufo.weebly.com/uploads/1/3/5/4/135400675/xakokufimazezed-delipule-nafuxasofawulur-bopujibusakile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vukenorap.epizy.com/face_changer_app_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/domezo.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/woxit.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/doruvimezoximasonewapok.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/fomixetaputo.pdfIn PDF document text
    • http://selifesupenikiv.epizy.com/gathering_dreams_income_report.pdfIn PDF document text
    • http://gurunetotej.rf.gd/38544211411.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/35149152703.pdfIn PDF document text
    • http://rapuzivawa.epizy.com/hardest_bible_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/lirawilitisawibozebiz.pdfIn PDF document text
    • http://dabevejef.rf.gd/game_angry_bird_rio_mod_apk.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_off0000f283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF283 4792 bytes
SHA-256: 3fb4c0d0b351f0ad52ad495e44334b76ef145d43679cbd2089aa08fa093afb43
font_01_sfnt_off000102ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EA 10784 bytes
SHA-256: c0d367ab0a9fdb2e8423505b406879ca81a09d884150ece0dca4a2e11cb11abb