Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d46a2976e474d21…

MALICIOUS

PDF

69.4 KB Created: 2020-12-08 19:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e819cbd30d860269e1123b2ca9858377 SHA-1: 1cd2e95c5b5da38b6c7c2bf928687f4042720e4b SHA-256: 1d46a2976e474d21a67b18779f87bfeb3c796c1a0890c1f16fc9345bff7a0600
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a link farm with numerous external PDF links, one of which is to 'trafffi.ru', suggesting a phishing or redirection attempt. The document body, though partially corrupted, contains text related to a 'Maine child care voucher program', likely a lure to encourage clicks on the embedded malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/strik?utm_term=maine+child+care+voucher+program
    • https://cdn-cms.f-static.net/uploads/4476601/normal_5fae2ab758f11.pdf
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/muvolexebizofe.pdf
    • https://dajapofijakaf.weebly.com/uploads/1/3/4/2/134266914/a6f8b8e5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/47a08a6f-0818-458c-a401-f3d742ebc553/40_hadith_nawawi_in_english.pdf
    • https://uploads.strikinglycdn.com/files/12ab6488-999f-4b83-98b8-d9446a270b0a/nunadepa.pdf
    • https://uploads.strikinglycdn.com/files/c693ad70-ad8a-41fa-bb36-e4fbdb07b242/10381177965.pdf
    • https://uploads.strikinglycdn.com/files/da68594a-098c-40f4-9bd5-8d07de70f500/pathfinder_earth_elemental_race.pdf
    • https://uploads.strikinglycdn.com/files/8459c106-39dd-4cd3-9904-4be5c5e6d11c/87355742688.pdf
    • https://uploads.strikinglycdn.com/files/e1cd4e63-9b8c-454b-abf1-da8c521d7013/mamafafubonuremij.pdf
    • https://static1.squarespace.com/static/5fc5d63fe2fce462bcadc7f8/t/5fcdfe3da87f9f1b19fe0a6f/1607335486311/robot_tactics_real_time_robots_war.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c46b.bin
dff8378dcce547be9fade9625a14c6511809a03c591ce7cf96bfd6c96b3ebaae
pdf-font-stream PDF embedded font (sfnt) at offset 0xC46B 5176 bytes
font_01_sfnt_off0000d5ce.bin
15ef1d3c10e60d45b26c4301add4b476f3e458cfeaeaac8e29f1ec0efa96a635
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CE 10828 bytes
font_02_sfnt_off0000fadc.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xFADC 4324 bytes