Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f170932e9b7fdbc…

MALICIOUS

PDF

75.0 KB Created: 2020-12-17 17:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6aa0ed75aa5d4a0fa0ffa08746f3dbeb SHA-1: d1cb217f1426e772c6d168c2e06552b3fa04cea2 SHA-256: 1f170932e9b7fdbc48ea070e4fd6e20c62cfb211e5913cbc4d36884cc5555931
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffine.ru/strik?utm_term=skyrim+halted+stream+camp+crash'. ML classification and ClamAV also flagged the file as malicious. The embedded document body text is heavily obfuscated and unreadable, but the presence of a malicious URL strongly suggests a phishing or malware delivery attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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=skyrim+halted+stream+camp+crash In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5f9d15f72939a.pdfIn PDF document text
    • https://zinawadasug.weebly.com/uploads/1/3/4/3/134312837/boliga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452374/normal_5fc104c9c8e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f893e18a4b05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470532/normal_5fd856a1b1314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f898912c8c6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5fa2a391a4b0e.pdfIn PDF document text
    • https://dewejudinasul.weebly.com/uploads/1/3/4/7/134702466/4037398.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2c204c30a162e0c5e803a/t/5fc42f9c5147b14804b74ecf/1606692764937/glencoe_algebra_1_textbook_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdeffc7d-5517-42d3-9a61-b2218daf29c3/70132236840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9e2df3b-8263-446e-ac03-4c0cba57b0c1/lijifobive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5259cb98-fb2d-4ecf-acfe-17ecf9170a64/charles_raymond_watches_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4642f6a8-8151-48af-a43b-c22852943ea8/lavergne_high_school_address.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc393df8787e879897cc7dc/t/5fcf72897379aa359778f8bb/1607430793359/xaparujabosidofonad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcebba1b44223045ec9a9d5/t/5fd1cbf3871f8c6e595cedbe/1607584760843/folof.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_off0000e670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE670 5580 bytes
SHA-256: 844297e902b794ebdb66a94ab73c4787d015b72e31a59c51c34ddd4d1bfa0504
font_01_sfnt_off0000f947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF947 11480 bytes
SHA-256: 367b519f21c576b6311581e001d4817995e09fcc107ccce227edca1a9973da0a

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