Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d341aceeba49bc5…

MALICIOUS

PDF

67.4 KB Created: 2021-01-24 22:27:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0b10c7bf3a3a4fb46724067efa05990f SHA-1: bef0e3ab991d1a680643aa58b5ffa380feea61cd SHA-256: 6d341aceeba49bc5cef0579ceeb7370ffd25bb9479834b0f31130460ff0629bb
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://druttle.ru/wb?keyword=hey%20reporting%20live%20trap%20bunny%20bubbles%20song%20name PDF link annotation
    • https://cdn.sqhk.co/sifilefu/Eheifho/44565347252.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425217/normal_5fe31b5704f0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493610/normal_5fdd6df5575fb.pdfIn PDF document text
    • http://bachanalytics.com/gunblood_game_hackedk7a53.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/dljiha6/cyberfoot_2019_download_pc.pdfIn PDF document text
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/85b95.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/hhShglP/81582891845.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/7847254.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/0icjkUC/couple_ballet_dancers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419192/normal_5fcc4e6ed6921.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/cmyiaIs/39477469268.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409628/normal_5fe4f027b9391.pdfIn PDF document text
    • https://kanumipiga.weebly.com/uploads/1/3/5/3/135346224/4903861.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/pirofopafu/xakux.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/vefoxubogajanetesedi.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_off0000c9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E1 5404 bytes
SHA-256: 090ae6658baa7de1655faa0c160f6f1b63eb55a33e035a9be9f588616fb8c11d
font_01_sfnt_off0000dc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 10596 bytes
SHA-256: 20d48d22765fb551e8489cc8b951ea61f280e6f48388c62535a1ee0375fa38bb