Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b076562fa392c7c…

MALICIOUS

PDF

72.9 KB Created: 2020-12-27 09:07:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 6bcddc27c34ffa16d384e754c38a32b1 SHA-1: 13f26c1c515fb4d83b478edaabfdb83680f07d33 SHA-256: 4b076562fa392c7c7940a60a1981def457b2000016ad02cf9c09c157c4cce664
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs to a suspicious domain, likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to reference 'Britney Spears criminal song video', suggesting a lure to entice users to click the malicious link.

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://trafftec.ru/aws?utm_term=britney+spears+criminal+song+video PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476939/normal_5fddae5cb50d7.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/higVicF/boo_boo_kitty_f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503214/normal_5fd044549c834.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528780/normal_5fc7f230e492e.pdfIn PDF document text
    • https://cdn.sqhk.co/miviluwulux/SG5AhVM/tipotimavonipuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad5037e-1e1d-4cab-ae88-23ac0963c313/1442441854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/655984e1-f437-4206-b83e-eb69807795a9/49694340041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73346a54-97a1-49db-80dd-32b7c19e6eb1/proform_cardio_crosstrainer_820_elliptical_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9823a891-bf6f-441f-b6b0-2c35bce9b115/uncertainty_definition_business_tutor2u.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db45abc0-7f25-4f3f-ae83-c8f6aad79327/56715635925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b982645-1576-4fe3-8862-0234783cb633/tank_multiplayer_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a21dac-758d-4dab-a357-8c1d898d1833/supra_mayro_kratt_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0abd6ad-5e7f-4cb7-b298-e2624abc2f9c/confirmation_letter_sample_for_bank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe5f6f5-451e-4389-9862-5aaa1a2f8f90/vitukazugabuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bfcb16b-cc6e-4f6e-a1a6-4b8c3e643f1a/62815459266.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_off0000deea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEA 5604 bytes
SHA-256: 2fdf370f6e433e46f39ee6c45460166fa54100b79e756db46b2a76bffe449e9e
font_01_sfnt_off0000f1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F3 10668 bytes
SHA-256: 4935452d579f40deea36880610dfe42eaf035c406513ab8b68e5d5ceaeae17a3

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