Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3ba1eb6cf40a0a…

MALICIOUS

PDF

68.5 KB Created: 2020-12-17 10:23:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8f82b33bf2f06182d6774e0d88817578 SHA-1: 987292d5753246242e7e7e976430d1573a3c79c0 SHA-256: 0b3ba1eb6cf40a0a09d9ff6b23b7e3832520319c0b5adbe61d717f8f22461fb3
116 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate it contains external URIs and a callback phishing lure, suggesting it aims to trick users into contacting a malicious entity. While no scripts were extracted, the presence of external URLs and the phishing lure strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafficel.ru/strik?utm_term=tipton+county+school+calendar+2015-2016 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482648/normal_5fd350c484349.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446494/normal_5fc7c791df334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_5fb47eea5eacc.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/d5feae2c-b4d7-4aff-8ff7-fe35c3653105/powder_puff_tree_pictures.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe10c861e25426e1008d90/1606291657732/the_wolf_queen_awakened_skyrim_walkthrough.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2862591a-ffaa-482f-97f3-d0a438b3cc3b/gibumepenuna.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ef906b97992eb55c42ef/t/5fcb9eda21c0486e919862d7/1607179995286/brain_surfing_2_level_16.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c51f8787e8798984abf3/t/5fcb2803b6b7366152f432d7/1607149572268/first_strike_ability_mtg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e89e6c-6ea4-4119-82c0-980f6f5508df/rapuropaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6734a69b-194b-43d3-83f9-9251e5cc651d/16088199934.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfeb102bbd74065800e14d/t/5fc2c505bc819f1cf43412de/1606599942523/44088180489.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5da01bda9c57a97e01dc8/t/5fcd8d9c1e1a4d7de143f63c/1607306653170/45434142252.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/rabuvarubagokikimagezi.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_off0000cc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC78 5848 bytes
SHA-256: 9639878b00e2a98107f3ab9f5c99c6b39b828bbd4db754524a241e0622d1be45
font_01_sfnt_off0000e06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06F 10744 bytes
SHA-256: b882fcb725dd7bbc40388e2542ea9a75b27ca6649ef1caf613600bab108788e6

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