Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0a007df78b339e…

MALICIOUS

PDF

58.7 KB Created: 2020-12-23 03:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 5a435a83c3246431c4eaf5233d2b65e0 SHA-1: d2f17e2b7cf3b77cb309018b53b183714d13c52e SHA-256: 4b0a007df78b339eadda56ff81f0f457a1286eeba4bd8edf2e3d7a5555c80a64
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffking.ru, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic 'SE_LOLBIN_RUN_COMMAND' suggest an attempt to execute commands or download further payloads, likely via embedded JavaScript.

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
  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://traffking.ru/123?utm_term=heavens+on+fire+bass+tab In PDF document text
    • https://zupelewelasilag.weebly.com/uploads/1/3/4/5/134594614/zuruxudafiti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383561/normal_5fc5c8672617a.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/xuvutuwelariro.pdfIn macro / runtime command snippet
    • https://cdn-cms.f-static.net/uploads/4424036/normal_5f9f777f68fed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412896/normal_5fce276b7df67.pdfIn PDF document text
    • https://bololadagulit.weebly.com/uploads/1/3/5/3/135348095/6c5169d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451348/normal_5fe29569f2057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459483/normal_5fb2cbce0ab83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5f982fac12d52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/43835In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4ed69e2fce462bca5ae1b/t/5fcabb8e6fcc1c6c461455f6/1607121807039/orange_tree_leaves_curling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60de08ba-b9ca-476b-8c01-706974582ffe/25873959691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad9953dc-e4ac-42a7-a800-bad81401adfe/butikevu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5072ec14dfd36fe0c117c/t/5fc8649ce101942bf76f8d67/1606968477154/6714399879.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_off0000ac7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7F 4892 bytes
SHA-256: 1ec373480c7719418ac14e21e267dea3571c79c7e631d85fdeff64bd783f71c3
font_01_sfnt_off0000bd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD34 9764 bytes
SHA-256: ad7e1b56fee568f00c1ca9a59fdd1a555fc0c16c8573a68e215acec922242f4a

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