Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d7e5c7c139df21…

MALICIOUS

PDF

70.3 KB Created: 2020-12-25 19:03:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e75e146b5c3b6e8e709d314290ca2d50 SHA-1: b645b0c1e3eb078986a5e1678041d15cc3cdd428 SHA-256: 68d7e5c7c139df21ba949da6714e968311744837b3023da572965b2a0de322b4
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a redirector link and a link farm. The embedded links, such as 'https://traffking.ru/strik?utm_term=safe+wifi+verizon', are designed to direct users to potentially harmful websites. The presence of numerous PDF links suggests an attempt to create a link farm for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • 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/strik?utm_term=safe+wifi+verizon In PDF document text
    • https://cdn.sqhk.co/baxemazisod/ehi8StC/54680250604.pdfIn PDF document text
    • https://vakogupomuniv.weebly.com/uploads/1/3/4/6/134610568/4682125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499999/normal_5fb3f96dabb04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382414/normal_5fe57beea6b4a.pdfIn PDF document text
    • https://xukukotazu.weebly.com/uploads/1/3/4/6/134654047/1267297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_5f9a9f8e95474.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/fhhgfDX/vilijakiwetulunerawesep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413113/normal_5fbee014d3b36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_5f9d186084244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463791/normal_5faf526a7256b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489440/normal_5fccd4050662c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EB 4856 bytes
SHA-256: 496f3849ce3653ccfcc9e5f0ed84fd1299afeb3f3aacacf6c1457958a9dbdd60
font_01_sfnt_off0000e6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A5 10912 bytes
SHA-256: 35a3c6b3fe547a359775ca305b3a7b67feafaec55d56d1bc229f571a39bbc001

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