Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73eb14f91615da1…

MALICIOUS

PDF

75.5 KB Created: 2021-04-27 11:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec3e60616d4c945aa81a0019c7fe25f0 SHA-1: 99af2ef6a79b8b87922dd56bbc3d18a87d976852 SHA-256: d73eb14f91615da1e8dfd7b48026fe83406a9705d3b82a01c94a4732a299f9c9
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'ponafet.ru/strik', which is likely the malicious destination. The document body, though heavily obfuscated, suggests a lure related to 'Woodworking for dummies'. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly indicates a phishing or malware delivery 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://ponafet.ru/strik?utm_term=woodworking+for+dummies
    • https://static.s123-cdn-static.com/uploads/4416669/normal_5fefb3072049d.pdf
    • http://serovakarara.mygamesonline.org/8501680886.pdf
    • http://fedemofutig.22web.org/97802910667.pdf
    • https://static.s123-cdn-static.com/uploads/4405662/normal_5fce408a48155.pdf
    • https://cdn-cms.f-static.net/uploads/4389107/normal_6024083278403.pdf
    • https://cdn-cms.f-static.net/uploads/4379217/normal_60383f556e491.pdf
    • http://nigemutekilum.mypressonline.com/free_printable_blank_bingo_cards_for_teachers.pdf
    • http://dosijefa.mypressonline.com/dudidudejojene.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jasadavebaga/complex_circuits_worksheet.pdf
    • https://s3.amazonaws.com/xopugup/2020_audi_r8_v10_performance_coupe.pdf
    • https://uploads.strikinglycdn.com/files/a78b2327-f345-49bf-a01a-44f0105dcead/does_taco_bell_have_a_healthy_menu.pdf
    • https://s3.amazonaws.com/lukepepe/dafojos.pdf
    • https://s3.amazonaws.com/zolerazowubow/enthralling_performance_bard.pdf
    • https://uploads.strikinglycdn.com/files/33c3de54-0307-4fa5-acdb-03210f8d0677/regawu.pdf
    • https://s3.amazonaws.com/jiwisigetizoxif/beavers_bend_fly_shop_fishing_report.pdf
    • https://uploads.strikinglycdn.com/files/c39e62a7-d7c6-4318-87aa-d247abd71216/72612657206.pdf
    • http://leparitupoxow.onlinewebshop.net/anunnaki_romana.pdf
    • http://makodugaz.epizy.com/introducing_sociolinguistics.pdf
    • https://uploads.strikinglycdn.com/files/07a8a3f6-79fd-4fd3-9131-7b3313666156/89987498222.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_off0000ea79.bin
498a7c1626b1ebfd0356866e32250b4084bc5c5f2189d7d6b757e436d8bd0829
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA79 5156 bytes
font_01_sfnt_off0000fc13.bin
c15e82699caf1a1b671f4c68c549f79c15b1e24c66e15eddac6690e9ff0e48d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 10736 bytes