Malicious PDF — malware analysis report

Static analysis result for SHA-256 e098e416d31a851a…

MALICIOUS

PDF

65.4 KB Created: 2020-12-04 19:06:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92835c2c382e485f08bb034d415e15b9 SHA-1: 57da02608fcfd5025c6ea2e36b0be6bdd916ff5f SHA-256: e098e416d31a851a1b42df011127f862d08f6695adb1897b9a9a66ab70faa12b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF document flagged by ClamAV as a phishing trojan and a machine learning classifier. A critical heuristic indicates a 'Browser extension / update installation lure', suggesting social engineering to install malware. The embedded URL likely serves as a download source for the malicious payload.

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/123?utm_term=black+ops+3+zombies+dlc+2
    • https://cdn-cms.f-static.net/uploads/4381534/normal_5fc37a7f368b3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7adb1397-9fd2-40c8-b7aa-b103b91abc55/xetefalisixozas.pdf
    • https://uploads.strikinglycdn.com/files/2915ca1a-aebb-4da6-adf7-9204271942f3/46954595294.pdf
    • https://uploads.strikinglycdn.com/files/a9f14172-bcae-4d7d-a61d-12db7eae2c44/89441523068.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe13ce4f98375720a82efb/1606292431311/train_fever_signals_guide.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4fe4f81c9a2a0c989788/1606373351783/lavugarezafebagutojero.pdf
    • https://static1.squarespace.com/static/5fc013fe3398ff751529adbc/t/5fc1bdec5147b14804742038/1606532589238/vejigixekekebo.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfd2429c5e26690260189/1606221092295/xagexixelarom.pdf
    • https://static1.squarespace.com/static/5fbffbf92e34347c703edab4/t/5fc2fe64fa04221c7182df3b/1606614630369/dazipulekitifemexaj.pdf
    • https://uploads.strikinglycdn.com/files/788b9756-1220-47e1-93ea-720323e5e144/vitimezetunedag.pdf
    • https://uploads.strikinglycdn.com/files/ed1ee707-7f94-479b-a261-fa5b2846abe5/rabatog.pdf
    • https://static1.squarespace.com/static/5fc0d52e3dfdd95b60d4bb65/t/5fc113269b1ed0353801ac24/1606488870741/k_of_c_hall_pinconning_mi.pdf
    • https://uploads.strikinglycdn.com/files/546a9431-a20a-47c4-a4b8-bc16f8c953c1/zitidutoluxerofolip.pdf
    • https://s3.amazonaws.com/leguvefu/fijobepuxogarodonu.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_off0000c1fb.bin
0f8bd46c643e6e8226e5eed67219417a2a2759f455c3cb905882ab3faf26391a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FB 5724 bytes
font_01_sfnt_off0000d564.bin
b65f9e6a91a98a7799807e59c69fbf17cc132bd9625c5878973b78d6243ed6e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD564 10384 bytes

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