Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2b1e132d16194e…

MALICIOUS

PDF

88.1 KB Created: 2021-03-23 18:59:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c57d5cd07cf46eeb6b79d83ad7bbf035 SHA-1: 8b91128531778b31892a11cff97b60599f9b7d20 SHA-256: cc2b1e132d16194e94b4aea160a7469a8cbafdd16fac8cc2f93fcd3fc7bdf90c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for a 'PDF_SEO_LINK_FARM'. The document body, though heavily obfuscated, appears to be a lure related to 'Shogun'. The presence of external links and a ClamAV detection for 'Pdf.Phishing.Trojan' strongly suggests a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jacksth.ru/strik?utm_term=shogun+james+clavell+synopsis
    • https://novomuzedideb.weebly.com/uploads/1/3/1/4/131406537/wosidad_xenigi_dabiwutaxitanu.pdf
    • http://cashbackk.site/cute_cartoon_panda_plush46ue4.pdf
    • https://motisodufar.weebly.com/uploads/1/3/5/4/135400919/7173493.pdf
    • https://cdn.sqhk.co/xoberuweri/hfCh7Sg/88985678144.pdf
    • http://ecosbor.net/dawagabupexewekasumofanin2r1lg.pdf
    • https://gojanaribebiw.weebly.com/uploads/1/3/1/4/131437307/lalazi.pdf
    • https://cdn.sqhk.co/butiluluvuk/gfRgfgj/19601489354.pdf
    • http://realwockyc.info/59601730524dvptw.pdf
    • https://zitavuzan.weebly.com/uploads/1/3/1/3/131379524/d19a3c39.pdf
    • https://cdn.sqhk.co/bexutavukaro/hihivja/corpse_party_blood_drive_download_pc.pdf
    • https://cdn.sqhk.co/wepigosogo/iidNLi7/find_my_friends_app_on_iphone_xr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/62e19c91-04f7-4be3-a70a-40cea26cccc8/1933150476.pdf
    • https://uploads.strikinglycdn.com/files/3531df22-0ede-4920-b6ff-807464571550/89353338550.pdf
    • https://uploads.strikinglycdn.com/files/a934f940-7287-4814-a9b2-4e106eb99923/poderapigorifevirir.pdf
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_7c82e2708ed54376bea617287fa0e126.pdf?index=true
    • https://6c639bf1-704a-4500-b661-329758898742.filesusr.com/ugd/02d620_3327fe2ede9244a79111c6a709f81739.pdf?index=true
    • https://uploads.strikinglycdn.com/files/11e8ea9c-79cc-42bb-8ef6-2d71d62be05c/dewar.pdf
    • https://uploads.strikinglycdn.com/files/d8ccc397-94f5-453a-add7-64efb8dfcbd1/guwojujisip.pdf
    • https://uploads.strikinglycdn.com/files/890ee828-dbed-4a03-93d3-3f4e3ff6a090/miditipinejujesiwovofob.pdf
    • https://uploads.strikinglycdn.com/files/92ab30db-4377-4123-91be-0e4f94e27e0a/bafetawazerugilivuzik.pdf
    • https://uploads.strikinglycdn.com/files/f1b7f6ed-316c-4aa4-9c93-5a648d2df609/8076263214.pdf
    • https://uploads.strikinglycdn.com/files/cea6b4bd-500d-4e7b-81ea-4314249f8223/tulaji.pdf
    • https://uploads.strikinglycdn.com/files/70783b07-9a09-4ce2-8f91-0fe4e3da0b21/les_miserables_victor_hugo_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a90.bin
abfd9e6f0f5aa81323911211088589847a4ca8da3499eb63632fa70a332125af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A90 5592 bytes
font_01_sfnt_off00012d90.bin
f9aebd096e45eea69f752dc4cb3e76fe3c0dcbb6c9ab394a6e64145f4c7d6325		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D90 11360 bytes

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