Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed520cbc47805822…

MALICIOUS

PDF

67.1 KB Created: 2020-12-17 01:27:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8580cc6608439d2ed2e38c406e2d20e0 SHA-1: 51fc4147bba39d8398149aa1edbb477c61ff2999 SHA-256: ed520cbc47805822d076342d944062c8456e8efaaf0967c3b7038abed58be70b
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though truncated and obfuscated, suggests a lure related to a 'Monster manual 3 4e pdf'. The presence of embedded URLs and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://trafffe.ru/123?utm_term=monster+manual+3+4e+pdf
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5f94aa386879f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/511bd3af-fb02-4eab-b3c0-42d01a42befb/wodarajizotilen.pdf
    • https://uploads.strikinglycdn.com/files/7a3cefcd-77bf-41ff-a472-abde77e485fb/12372140325.pdf
    • https://uploads.strikinglycdn.com/files/36d2accd-5a4b-45d2-b2c8-8e076dfccc48/58236078629.pdf
    • https://s3.amazonaws.com/lurutopobi/constructivism_theory_vygotsky.pdf
    • https://s3.amazonaws.com/wobuzisibal/mht_cet_hall_ticket_2019.pdf
    • https://static1.squarespace.com/static/5fc4cad1f7cf8c754043c6f3/t/5fc7dc81253bd072b58c4859/1606933634449/ufc_weird_fighting_style.pdf
    • https://uploads.strikinglycdn.com/files/f205bde3-24d5-44f6-9f47-f071163f181a/vapolokaxazuv.pdf
    • https://s3.amazonaws.com/fizufapu/kajiluwonefelixonodibuken.pdf
    • https://s3.amazonaws.com/rufonali/features_of_a_newspaper_report_ks2_display.pdf
    • https://uploads.strikinglycdn.com/files/f66be4a0-77bb-4935-873f-cacc7b8f3a5c/chemical_names_and_formulas_worksheet_answer_key.pdf
    • https://s3.amazonaws.com/bibejovixapis/hyrule_warriors_definitive_edition_gold_skulltula_guide.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48f0eaf37e3b6491d2e8/1606371568654/goku_all_transformations.pdf
    • https://uploads.strikinglycdn.com/files/c124392e-c357-45c1-8549-3f5e9fb94278/12931747847.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_off0000b7d6.bin
e37e98d4bd73fa5dad2c90b913cc25923e99a8f1d0fedce32ed9a76ef9e35621
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D6 5280 bytes
font_01_sfnt_off0000c9b6.bin
2e9f41e7d76436809411f3baecd8209760a6c68da04097918ecf7e904b40007e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B6 11280 bytes
font_02_sfnt_off0000f015.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF015 4324 bytes