Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f070a8630c9355…

MALICIOUS

PDF

68.8 KB Created: 2020-11-14 00:22:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 736bdcb47ea8edf274cd80f67785ce0a SHA-1: 03e676fb95c4ec1b3cc1371b0abbcff3df11c599 SHA-256: a4f070a8630c9355b94b6986ad2f79b454005bbb5b768dc8d49019f416de2cf1
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to publishing templates. The presence of an external URI indicates an attempt to redirect the user to a potentially malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=pull+up+banner+template+publisher PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377407/normal_5f8e32ec47c09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456122/normal_5fa1cd3fcd717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f90be1399355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_5fada3906598b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450502/normal_5fa60b8f6d759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379719/normal_5f8ce87fbadb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_5f9429996734e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f89de2662053.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/cb364059-9d64-4bb8-bfc2-ab91618d0187/78928414699.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/bolc_for_military_intelligence.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/sisk12_district_65_student_login.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/1977229458.pdfIn PDF document text
    • https://s3.amazonaws.com/remoxi/53689790040.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_off0000d016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD016 5200 bytes
SHA-256: f998105960461a71caa96235d72662991ca595406b5f5083e4085537f0fca93b
font_01_sfnt_off0000e190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE190 11268 bytes
SHA-256: 8248f1d725c5f6ac60b21d8fd6f6f008e7df83ada0845820e32d2c7ce315a87f