Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f0aace358d340f…

MALICIOUS

PDF

71.9 KB Created: 2020-12-26 11:42:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d6374965c941b5e3a7e5708c862ebfb SHA-1: 4dc81ca8f4d6c38e4703d1c7fd53d1db1c370d28 SHA-256: 19f0aace358d340fac6690d77ba7a83aecb6c1c2a33dfc9260d4f80a35055bb0
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the presence of a link farm, with the primary URL being a suspicious domain. While no scripts were extracted, the embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?utm_term=mx+player+apk+pro+mod
    • https://cdn.sqhk.co/saseponirifa/hbgcdjh/meledit.pdf
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/nijujupuxuxexodixuze.pdf
    • https://witufulovavivoj.weebly.com/uploads/1/3/4/3/134351467/7e7582c21d.pdf
    • https://vobokalonumenu.weebly.com/uploads/1/3/4/6/134656332/pifarafinogu-gamawupafu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/562570cc-f87c-427c-a0bd-4c6a97864cca/gexamid.pdf
    • https://s3.amazonaws.com/mubemutolewe/dakeled.pdf
    • https://uploads.strikinglycdn.com/files/903eb69c-f03a-4955-bb92-836944e45cd0/watch_angrez_full_movie_online.pdf
    • https://uploads.strikinglycdn.com/files/dde0d9c9-b4a3-4828-9505-ae5adfedebd5/73416856245.pdf
    • https://uploads.strikinglycdn.com/files/4de8fdae-66f5-4ed5-9225-41c96456e246/55939493277.pdf
    • https://s3.amazonaws.com/belopudevuzuza/metal_gear_survive_xbox_one.pdf
    • https://uploads.strikinglycdn.com/files/5f065a32-81b6-4dce-8958-dda5977a1c85/63515991244.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_off0000d2c3.bin
ae4db247986ea44ea25bfcd8f72fed2a7280be4e64158c72dd9c2f9edb4770c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C3 5164 bytes
font_01_sfnt_off0000e45b.bin
5e2ab3d1de4e124cecbefe3f89f850deae679ab2df2549602ac8e1025cf9210d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE45B 14536 bytes