Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfe11e75846d92e…

MALICIOUS

PDF

70.5 KB Created: 2021-02-22 11:20:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 92b5971c25337aa7a096427607b1d325 SHA-1: 7fc502945ae2cf33222122926b5856c3ebaf4fa8 SHA-256: 1bfe11e75846d92e5f3f733a0580a7d66c6c56253230794a89847d4384bb52b0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=ayn+rand+fountainhead+essay+contest PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487916/normal_600bc77fc26d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425230/normal_5feec8857fd36.pdfIn PDF document text
    • http://copyright-supporthelp.com/harpoon_lagoon_jellyfishh6ov0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484639/normal_5fd1aa6bc28fa.pdfIn PDF document text
    • http://tells.fun/zivipupihsfht.pdfIn PDF document text
    • https://nalodewemutut.weebly.com/uploads/1/3/1/1/131164475/duduxegasov.pdfIn PDF document text
    • https://zunodeni.weebly.com/uploads/1/3/1/0/131070331/7673467.pdfIn PDF document text
    • http://antileqphh.site/zimenibukafisabem5accf.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/fajonubinomeder/free_wordpress_templates_for_business.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/bhojpuri_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/xodalexobuxosizitiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/batman_vs_superman_ultimate_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/valproic_acid-_induced_hyperammonemia_a_case_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/pisiwudita.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/premam_full_movie_in_tamil.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_off0000d5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B0 5168 bytes
SHA-256: d2bac46f73f4b7da13f65d2249833df3ca504526ba1b2b892a8dbdd81d443151
font_01_sfnt_off0000e74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74B 11180 bytes
SHA-256: 8d7692ad7251f1440b698214bd5a1bb5be8a709b253880d304e3b0cf660cdb8b