Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4960930ee8536c…

MALICIOUS

PDF

67.9 KB Created: 2020-12-21 13:18:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 345718caf774de0f904edea04cdcf64f SHA-1: 9a1b85814f211f75cef4a780a6d7f97f2a0e233f SHA-256: 9e4960930ee8536cd1bf433e237321f2748e5833ab249dbe4c43059ee77a8b82
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The primary malicious URL identified is https://trafffi.ru/strik?utm_term=dns+switch+unlock+region+restrict+apk, which is likely used to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffi.ru/strik?utm_term=dns+switch+unlock+region+restrict+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374022/normal_5f8a622fd0061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f8773b0c6851.pdfIn PDF document text
    • https://ronabamipiboti.weebly.com/uploads/1/3/4/5/134598089/motolinajofizoj.pdfIn PDF document text
    • https://bikinolij.weebly.com/uploads/1/3/4/5/134514604/wenara-lewonun.pdfIn PDF document text
    • https://wolalusajiri.weebly.com/uploads/1/3/4/6/134600438/7308798.pdfIn PDF document text
    • https://dowuxagexejilen.weebly.com/uploads/1/3/4/7/134719956/e4d8c99a2d207.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/2d09ad45f802a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406809/normal_5fa0e5d68e78f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/dizemedazidetutusuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85c68dc-d571-4cba-a7e3-6b2c3dfb9340/simple_vs_compound_interest_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e62fb8-6a21-43db-b3ab-d07eaf175b3a/hampton_cruiser_bike_prices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19bf8dce-a95e-48b8-bd85-38b0847c76ef/25875452668.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/turning_point_academy_michigan.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_off0000ca39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA39 5352 bytes
SHA-256: 8c15f46c53c8976b222a1a0f8bcd27d1591cc9cb806d8acb2e19d6613eacb476
font_01_sfnt_off0000dc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC85 11436 bytes
SHA-256: aef72ecbd9738368cb49859c90152beedfdadd80d703fa91eeeaf123086dd679

Open this report in the interactive analyzer, or submit your own file for analysis.