Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c8a8095603c0cd…

MALICIOUS

PDF

124.2 KB Created: 2021-03-07 14:10:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: badd46ad1d1f370a64f2fb9f4abe9a46 SHA-1: d0a1b5ff114884d3328263b68c56de986b4d170b SHA-256: 16c8a8095603c0cddd4df7d464c647b35c2d753aa9b3e316ff889cf6d88ffa08
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that redirects to a URL designed to mimic a search result for a specific document. This URL is likely intended to trick the user into downloading further malicious content or visiting a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, and the PDF structure itself contains suspicious elements.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://bologen.ru/wix?keyword=wordsworth+preface+to+lyrical+ballads+pdf
    • http://supernefritroller.xyz/hundred_years_war_battle_of_1415_crossword_cluevlnj9.pdf
    • https://static.s123-cdn-static.com/uploads/4450138/normal_5fe5f2c7c809e.pdf
    • http://rubyshup.space/3089733428iw29r.pdf
    • https://static.s123-cdn-static.com/uploads/4450039/normal_5fdfb2c758650.pdf
    • http://podarokinsta24.online/160289941257vhxd.pdf
    • https://cdn-cms.f-static.net/uploads/4372955/normal_601fea13d2107.pdf
    • http://lusudebela.iblogger.org/linksys_re6500_wifi_range_extender_ac1200.pdf
    • https://cdn-cms.f-static.net/uploads/4490364/normal_6043be4315a33.pdf
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fec3fc1982b8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gidozowelixije.rf.gd/internship_report_samples.pdf
    • https://s3.amazonaws.com/jebupofedijakuk/alluvium_formation_geology.pdf
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_671b979d933e4ea88a42459b103cee86.pdf?index=true
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_5251c8558de943e78d5677d64104116e.pdf?index=true
    • https://s3.amazonaws.com/sulasatevirexo/vimukibelozodigotumalapid.pdf
    • https://s3.amazonaws.com/zomuzigo/computers_in_biology_and_medicine_template.pdf
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_2f57984ae5094d64a89203dfeddf5375.pdf?index=true
    • https://uploads.strikinglycdn.com/files/429a9929-271b-454f-843e-4ca7baed7225/rofafasavixavuru.pdf
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_7c9be489de6f44ebb0a6306f88d4ae46.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bfbd85dc-c801-4894-be39-e537e953dd43/32916337768.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_off0001ac71.bin
12a2eb6e2d1439721ae85d4e8048e4ab5b80aac39e5d22893de7f5d1d0361b9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC71 5592 bytes
font_01_sfnt_off0001bf8a.bin
1c0e36573efc149f24d1c6366d235bd724a04597cb81c28a2f256d6c517d88e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF8A 10452 bytes