Malicious PDF — malware analysis report

Static analysis result for SHA-256 43636b58d765cf60…

MALICIOUS

PDF

72.2 KB Created: 2021-01-22 00:29:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9e451e39d378198e3131468a30260e99 SHA-1: 61afcb7e0266585736d7d4dc66a64ecad4702a68 SHA-256: 43636b58d765cf606964b5dd66d5ddfc6b9c325ec5b55b8c694ae630576b5b92
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wb?keyword=spanish%20music%202019%20hits PDF link annotation
    • https://jizexukufi.weebly.com/uploads/1/3/4/1/134109318/kugosopin_semifusupu.pdfIn PDF document text
    • https://site-1178385.mozfiles.com/files/1178385/zopetasupupifukoxufelovu.pdfIn PDF document text
    • https://nojabepeteguki.weebly.com/uploads/1/3/4/6/134669956/rovutulexorimi.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/qghfjcE/67832276128.pdfIn PDF document text
    • https://zekilunadaxidub.weebly.com/uploads/1/3/4/6/134631079/bodekitakoji.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/gefhf8o/minecraft_download_chromebook_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/zijOvtg/luniput.pdfIn PDF document text
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/jusesu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449973/normal_5ffdd64b065eb.pdfIn PDF document text
    • https://site-1178468.mozfiles.com/files/1178468/masukopuw.pdfIn PDF document text
    • https://site-1174658.mozfiles.com/files/1174658/blocky_farm_field_worker_simulations.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/goviwigax/rugozejut.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/30533806034.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/cybernator_snes_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/forikasepegizavijedavivo.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_off0000d992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD992 5632 bytes
SHA-256: e8a846469ebe6c9992441d9ae7bdc55b607403b4bf53ff61b37a04c0b934f650
font_01_sfnt_off0000ec94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC94 12120 bytes
SHA-256: b32d8ad265d0300c6d2add4a55629a518007310e1ffe4db143ddaabbe954002c