Malicious PDF — malware analysis report

Static analysis result for SHA-256 d986b395241dea39…

MALICIOUS

PDF

105.2 KB Created: 2020-12-27 00:02:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fc10e36b2d914f75a53be95b3c21e343 SHA-1: b6d39608d941fb539fe2181bf9b1b0ae7fae02c2 SHA-256: d986b395241dea39f481b3aa69fcb5f4e554ff7f58a079a8038af904fcbf2587
116 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pattern, where the document likely prompts the user to call a phone number. The embedded URL, while not directly part of the lure, suggests a connection to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/strik?utm_term=university+of+miami+football+season+tickets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5f8ca0b1e539f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f993569aa02a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_5f99b73e88bb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422134/normal_5fdc398e06274.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495413/normal_5fceefef3d6ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451352/normal_5fa155a42ad43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458633/normal_5fd78abaaab7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457590/normal_5fcf789d9b0af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5fb2fd270a89d.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/bakoloj/vlc_media_player_beta_android_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fac8096-f1e4-4a29-8e11-7c14c4b2c9bc/binary_tree_level_order_traversal_recursive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb7dc80-1cbf-4c21-a2a2-87f989d142b3/vinugabafabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe38e75-4280-4607-9642-e2df41440207/mrs._potts_teapot.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/66160682755.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A65 5384 bytes
SHA-256: 2d0996c22e6dba35d7abaee8a95c5cb4ddfd69f762917e565445dd47e5858acd
font_01_sfnt_off00015cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CB1 10976 bytes
SHA-256: 8620199e373600df8b3b3260534673983269f974ca444dc72719a0ac260bd786
font_02_sfnt_off00018241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18241 16136 bytes
SHA-256: e062faff0b5f3d12ef96d17a813e209689a07cec8984531399442ab350abe39b

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