Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af5f15add95e861…

MALICIOUS

PDF

78.5 KB Created: 2021-04-16 07:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a4106c11e35446f556b5461a6b641d7 SHA-1: 6787f79de740d4084f53a6bc2ca3fcbd8dd2efb2 SHA-256: 7af5f15add95e8619c13f36cd9255f7031c391e5fe56f0a1c766e1583cec20c0
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a malicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to historical gas prices, suggesting a phishing or scam attempt. The presence of external URIs and the ML classifier's high confidence further support a malicious classification.

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://nipisod.ru/strik?utm_term=how+much+was+a+gallon+of+gas+in+1986
    • https://cdn.sqhk.co/vifamepupib/GLigK8x/97647498408.pdf
    • http://sejerodetupumil.medianewsonline.com/pekotoxa.pdf
    • https://cdn-cms.f-static.net/uploads/4480584/normal_60102b509162d.pdf
    • https://cdn.sqhk.co/xipapotug/8jiuxif/80474902173.pdf
    • https://cdn-cms.f-static.net/uploads/4445879/normal_602722c9004df.pdf
    • http://kowuterada.mygamesonline.org/in_vitro_anti_arthritic_activity.pdf
    • http://ramedefinu.getenjoyment.net/magic_quadrant_for_cloud_infrastructure_as_a_service.pdf
    • https://cdn.sqhk.co/resilano/fjhCqF5/wallpaper_app_for_pc.pdf
    • https://cdn-cms.f-static.net/uploads/4372972/normal_604e504c58b77.pdf
    • https://cdn.sqhk.co/kulizuxekume/jAhj9QP/nuwikawepowufepamo.pdf
    • https://cdn.sqhk.co/sipebesoxu/CbT1ghp/everfi_module_5_credit_scores_answers.pdf
    • http://tuzotumefakorok.scienceontheweb.net/lulikazir.pdf
    • https://static.s123-cdn-static.com/uploads/4454167/normal_5feee2adccaae.pdf
    • https://static.s123-cdn-static.com/uploads/4481675/normal_6006a99dbaeed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bed26d98-ce66-4138-b885-1bb922faccc8/muguvikojepefim.pdf
    • https://uploads.strikinglycdn.com/files/9060aab6-00ba-4eb4-8d23-6cb3d140fff5/precio_acer_iconia_tab_a200_32gb.pdf
    • http://sipanokule.onlinewebshop.net/thirteen_reasons_why_best_characters.pdf
    • https://uploads.strikinglycdn.com/files/67c1c2d5-b3fc-45ae-b167-a24324f74cec/63082144086.pdf
    • https://uploads.strikinglycdn.com/files/b2217c22-7a7e-4754-8eff-50917b1c0af1/sijexu.pdf
    • https://uploads.strikinglycdn.com/files/069dcc86-9d32-466c-ad7f-9fc22b1945c9/86922455933.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_off0000f120.bin
91462ed86e2711c4e4ef72de47a461a7272982300ab8e5970959eca77330b97f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 5808 bytes
font_01_sfnt_off000104d7.bin
3a50440fd849a947e2482f0626a95489203655ddeaf5df9785594a9eb3d23767
pdf-font-stream PDF embedded font (sfnt) at offset 0x104D7 11336 bytes