Malicious PDF — malware analysis report

Static analysis result for SHA-256 62282eca3a445fcd…

MALICIOUS

PDF

109.3 KB Created: 2021-03-18 19:09:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 34fd4ee466a82fdd16f70193fe49c9b1 SHA-1: a359e5da005bb2dbe9432a079b80bdaf9fc446bf SHA-256: 62282eca3a445fcde354b190163f029020140f427ebdb564d65af13719c84c6b
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a redirector link farm and a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting and potentially malicious redirectors, such as 'https://yafferge.ru/strik?utm_term=rock+band+4+compatible+instruments'. The document's structure and embedded links strongly suggest an attempt to redirect users to external, potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://yafferge.ru/strik?utm_term=rock+band+4+compatible+instruments In PDF document text
    • https://lokejefu.weebly.com/uploads/1/3/5/3/135301848/10ab30335670338.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447098/normal_6007689d50150.pdfIn PDF document text
    • https://marikiwow.weebly.com/uploads/1/3/1/3/131379510/a55776a924ff6aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453335/normal_5ff48ff08a4e3.pdfIn PDF document text
    • https://rozujefugupag.weebly.com/uploads/1/3/4/0/134017035/bololafagelisiviboj.pdfIn PDF document text
    • https://simepatu.weebly.com/uploads/1/3/4/2/134267103/533680.pdfIn PDF document text
    • http://tronreserve.online/zopuxewulapadusotokoxi4w5cf.pdfIn PDF document text
    • https://jozimowisefi.weebly.com/uploads/1/3/4/3/134331090/12a8f.pdfIn PDF document text
    • https://durunefa.weebly.com/uploads/1/3/4/7/134712847/8225040.pdfIn PDF document text
    • https://tipuzinugex.weebly.com/uploads/1/3/2/6/132682040/1862539.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/vadubutazoxiday96xr.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/lixuduwonifa/4801377743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5be6fb3-b5bd-49aa-9086-49e2b8c51f0a/mekadukazopuwimopapi.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/giant_steps_alto_saxophone_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/80271582390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e72ee3b-3bfe-4f5e-83f1-eff96fabd3ea/best_free_to_musicxml_converter.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_off00016f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F01 5516 bytes
SHA-256: b79dc9acb1132104a3f753cfa073f28b46988e9a64425b42ae0c5ec3e555c633
font_01_sfnt_off000181b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181B5 11216 bytes
SHA-256: 6d9ac6811570db54f2a6092237b29ede3856d3a6fddd3c787b15920daac83bf5

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