Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4aa6810adbdffe…

MALICIOUS

PDF

74.7 KB Created: 2021-02-06 16:51:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e6eb4d9b77a8e3f42879f422ce169438 SHA-1: 65fef0395f0f82b4f0945538664b9246c0e45ada SHA-256: 5e4aa6810adbdffeb44413acc652ceeb31fa8df66f889c96750fcda01d5c1c9e
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://jottigo.ru/123?utm_term=piano+university+cheat+sheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388427/normal_6013a0173608b.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/cgg0OCQ/17913333332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_600d4f06b0777.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/3XHibif/rexalufafoxikig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385634/normal_600af624b2c84.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/Dijjeii/79001742447.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/iKwjcib/theme_park_simulator_nintendo_switch_review.pdfIn PDF document text
    • https://cdn.sqhk.co/papebikuwi/gjiihiK/jivubabosofuwudivobopu.pdfIn PDF document text
    • https://pigumetazemebet.weebly.com/uploads/1/3/0/7/130775485/nabavetarufus_rudobuvuti_waretazaz.pdfIn PDF document text
    • http://copytoshka.ru/serelalokmq2qd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495685/normal_5ffc0bd28ff81.pdfIn PDF document text
    • https://cdn.sqhk.co/nulaliki/6NsAFhb/visual_studio_code_login_salesforce.pdfIn PDF document text
    • https://cdn.sqhk.co/livixugakuf/iiFjeji/fun_race_3d_apk.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/vuxalirudidel/30251891772.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/dijobedejoledatafukesobo.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_off0000e883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 5016 bytes
SHA-256: a1a26aae93ede653a86849f880cd6cde2a88b0b9984bbfc2bb54c20bf3c1b18c
font_01_sfnt_off0000f99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99C 10692 bytes
SHA-256: 680d2d1d77542d51173bf80b3848452afbf1f2841ef4aa50af6286833c0b8410