Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aaf61e9b30ace4c…

MALICIOUS

PDF

66.8 KB Created: 2020-12-09 23:48:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 17129e8b8f153005100c8c5585929559 SHA-1: 17326d15450a42240b8d94e21f4cec1c1759f43e SHA-256: 8aaf61e9b30ace4c95bcb4e34ab5cb0d5ff9190cddc43726b8890d09fdcb548c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV and ML classifiers strongly indicate malicious content. The document body, though heavily obfuscated, suggests a lure related to educational material.

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://traffnew.ru/strik?utm_term=heat+transfer+worksheet+doc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417306/normal_5fb99204013fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379718/normal_5fc9a1a565103.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dozore/21746982759.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e3e392c50b1a1e77824a/t/5fccc640eb18547f4b82364f/1607255617196/multiplayer_for_minecraft_pe_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae73d984-1611-4619-90df-bb5f722d5de9/4344648623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2705533-7da5-4972-a2a2-611c0b9b2722/gixufusosabidureminufe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6900dd49dd124475ba2bf/t/5fcc52ae74a40730fb8ec195/1607226030456/draw_n_road_uptodown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e19a97-f949-41b3-9ffc-c3230891e571/osmans_dream_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77a6fc39fde0238aa1b24/t/5fcb77fc1ef6d1662fef0357/1607170044893/17346536911.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/gebalizudazitufiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff1245e2-6acc-4982-a938-4390dec8216a/2020_estimated_tax_penalty_calculation.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c362403f5353fd950a5e/t/5fc125e5173fb5383bcb6ac1/1606493669419/67776041596.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84C 5192 bytes
SHA-256: 572fe963466d3e673a26b843f8f0a290fbf28041d9b58efedaf83e3719e2619a
font_01_sfnt_off0000da03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA03 10800 bytes
SHA-256: 2192070ddb0169011d13e512ea8fbb4ae7e6516294cb43fe3dde8f7ced7d7867