Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8624253d2e04a19…

MALICIOUS

PDF

65.2 KB Created: 2021-03-12 15:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6833e56edf29df58792fe259f60156ba SHA-1: bf9edd73c8b606a81114bfb809eb0c26b70813f6 SHA-256: a8624253d2e04a19f4ec59a8dedfb1a3ff762c958d4244e08dca013230b08254
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. No scripts were extracted, but the presence of an external URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=adriana+e+a+rapaziada++gratis
    • https://maposege.weebly.com/uploads/1/3/1/3/131378999/55bea08b8a232bc.pdf
    • http://rikafitamedad.medianewsonline.com/oakley_prescription_safety_glasses_australia.pdf
    • http://fegivate.medianewsonline.com/what_does_the_word_bogey_mean_in_english.pdf
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/7165583.pdf
    • https://cdn-cms.f-static.net/uploads/4370288/normal_604adcd04fe59.pdf
    • https://cdn.sqhk.co/zulatobi/heC7hjn/38771734001.pdf
    • https://salufisudad.weebly.com/uploads/1/3/2/6/132695294/velosatufup_wuwabe_nuvevotudilaw_vukone.pdf
    • https://cdn.sqhk.co/wafudovop/djburha/32865138446.pdf
    • https://static.s123-cdn-static.com/uploads/4495975/normal_5ffc66e4966ee.pdf
    • https://cdn-cms.f-static.net/uploads/4368958/normal_602f2d2a5af22.pdf
    • https://varusimutajol.weebly.com/uploads/1/3/4/5/134502614/gigobavafigexalufeji.pdf
    • https://cdn.sqhk.co/zukuxenopo/vy0Adhj/fenotofuwotexozemepabefon.pdf
    • https://fosegeluka.weebly.com/uploads/1/3/4/7/134717840/4598637.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6e2b2282-431c-48fd-8977-a7321545f7d5/what_is_the_most_effective_antibiotic_for_cellulitis.pdf
    • https://uploads.strikinglycdn.com/files/e205dc0e-8340-4560-b190-a728941299d5/what_does_it_mean_when_your_car_says_ice_possible.pdf
    • https://uploads.strikinglycdn.com/files/c0a1243c-16e5-48e2-8fd8-37d06df26d10/inateck_barcode_scanner_manual.pdf
    • https://uploads.strikinglycdn.com/files/ec67fdee-475a-43eb-95c6-ea3219bd5050/where_to_buy_gluten_free_food_in_singapore.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_off0000bfff.bin
edf0e5360971d007a2774f5cd6d8bf94f8e634443964cb62ef886a5ac97795a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFF 5132 bytes
font_01_sfnt_off0000d18d.bin
2cb8c7758547f31befef539e1ee881991af6920305479791d21b4d94f0ea338f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD18D 11944 bytes