Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb71a0740cb4946…

MALICIOUS

PDF

65.8 KB Created: 2021-02-12 22:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ccd57be3ba848b93cb0a4451c222c5f7 SHA-1: d6e9686f2e732a50ab3b1b6929eb1306b78fef08 SHA-256: afb71a0740cb4946cdfbc515d152fb1dc07efb58d14ce8b676fe1c1ea21a641e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=spr+k12+oh+us In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_600d160d7ab5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405639/normal_5ff774508afe6.pdfIn PDF document text
    • https://cdn.sqhk.co/sevimifogu/GXkhaib/voices_of_fire_choir_cast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403819/normal_5ff392cc2f829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_60109f4164904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_600bd83bcf74c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dijemawijopetu.epizy.com/19495376561.pdfIn PDF document text
    • http://kasojazosejona.epizy.com/sojosuvawawom.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/rawijuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/guide_rails_brooks.pdfIn PDF document text
    • http://jovovifanovire.rf.gd/14037271585.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/toxic_wap_full_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/rufime.pdfIn PDF document text
    • http://pogebikaku.epizy.com/catechismo_della_chiesa_cattolica_compendio_2005.pdfIn PDF document text
    • http://zukavinu.rf.gd/beat_it_michael_jackson_video_song.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_off0000c550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC550 5016 bytes
SHA-256: 47f0d5b5040d20ebb7423a5fe90dd985cd3482a05489971b3b16a11a611e463e
font_01_sfnt_off0000d664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD664 10184 bytes
SHA-256: 817e559c51217b6de100048fddcf9c5009ce3cb2bcb9de248f4285865a89ba26