Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca73781773e820f…

MALICIOUS

PDF

67.4 KB Created: 2020-11-26 09:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd182bc6285a239d431d0e597ac697b6 SHA-1: 117dada930b5233fc37c9af9610d4655cd851db5 SHA-256: eca73781773e820f0f34dbe0cf7292892b1829d39be048877006df3f38a9aa2a
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 URI pointing to 'traffine.ru' which is likely part of a phishing lure related to a 'network interference error code' for Samsung TVs. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the detection suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=network+interference+error+code+012+samsung+tv
    • https://vavuxajibibugu.weebly.com/uploads/1/3/4/4/134472661/1950620.pdf
    • https://cdn-cms.f-static.net/uploads/4415061/normal_5f949f52611da.pdf
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/fulugubu_devenujopu.pdf
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f883e4f996e9.pdf
    • https://cdn-cms.f-static.net/uploads/4469633/normal_5faa7630269a4.pdf
    • https://lunilipop.weebly.com/uploads/1/3/4/7/134745285/xozexasav.pdf
    • https://cdn-cms.f-static.net/uploads/4384030/normal_5f8f55eb18e31.pdf
    • https://cdn-cms.f-static.net/uploads/4381962/normal_5f8d56b44b0b5.pdf
    • https://naduwabale.weebly.com/uploads/1/3/4/6/134651235/mawomusezujemufuwije.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5128172b-6e5e-4992-ab9d-cb71fce615a1/21673591802.pdf
    • https://uploads.strikinglycdn.com/files/078c5516-bb33-4343-bc98-14b6dd4b6781/tovivikinedefu.pdf
    • https://uploads.strikinglycdn.com/files/e3112a2f-92bb-4a0b-940b-734b83a6fef8/used_cars_in_lynchburg.pdf
    • https://uploads.strikinglycdn.com/files/80afad0e-d3a0-4a8f-adc2-14285992ac98/70058299427.pdf
    • https://uploads.strikinglycdn.com/files/649053b5-ccc7-426d-91c6-26ad2779996f/72555442711.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8f6.bin
a79319783f5f9ed6477d62eb6d524ed4909c8f1366ee4506e6adb1da0eff6eb7
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F6 5820 bytes
font_01_sfnt_off0000dcdc.bin
6e01c2ad03cb2e90a38b5abeafff497ab374d8960d894285554e50b228990a6b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDC 10624 bytes