Malicious PDF — malware analysis report

Static analysis result for SHA-256 473903e997bf14b8…

MALICIOUS

PDF

66.6 KB Created: 2021-03-03 00:22:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1f7ea4284a937e8c8d5bf497ca34370c SHA-1: 3db65caffc8027b818ec211726b1c4bb33625a29 SHA-256: 473903e997bf14b8a82387cb6a29c8942bfe72a27297d1156296aabb391783ba
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=would+you+rather+questions+to+ask+a+guy+dirty PDF link annotation
    • https://cdn.sqhk.co/goworonol/8Bhqw91/mujanazopedekadoveta.pdfIn PDF document text
    • https://kikosezuzo.weebly.com/uploads/1/3/1/3/131378972/vuxekedamad.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/limewub/ajay_devgan_jaan_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/51804334162.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/guided_by_voices_propeller_discogs.pdfIn PDF document text
    • http://wamigorudazuz.epizy.com/10581687329.pdfIn PDF document text
    • http://soribasosavib.epizy.com/57117690352.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/displacing_indigenous_peoples_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/11555943869.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/how_many_calories_in_a_burrito_supreme_from_taco_bell.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/bses_rajdhani_electricity_bill.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/dell_latitude_e7450_i7_review.pdfIn PDF document text
    • http://gomojopovin.rf.gd/raxubesu.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/28116566443.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_off0000c853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC853 5392 bytes
SHA-256: b2f61c1a8b0e8aafed5eb032b94266db5564242c3f7e15e30dbe8a114546a6d1
font_01_sfnt_off0000daab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAB 10128 bytes
SHA-256: 9a448d2d08f0447618513e2f1ec08ac9a0fd2d688460aaf073aaeced503b9894