Malicious PDF — malware analysis report

Static analysis result for SHA-256 75294e7a599bac1e…

MALICIOUS

PDF

66.7 KB Created: 2021-02-23 11:00:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 795ed3342fee1e1fe91926e4bfe4d6b7 SHA-1: 5f90483589f899646c3289987cea833002a3e565 SHA-256: 75294e7a599bac1edc5466cffe30f0a7fd216c11fb8136ff10482df78b9d3099
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains and redirector services, indicating a link farm designed to distribute malicious content. The presence of a link to 'yafferge.ru' with a product search term suggests a phishing or scam lure. ClamAV and ML classifiers also identified this PDF as malicious, likely due to its link farm and redirector behavior.

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=sony+ht-xt1+2.1+channel+soundbar+with+built-in+subwoofer In PDF document text
    • https://cdn.sqhk.co/zabeluzitema/pzt0iaO/jobs_and_occupations_vocabulary_worksheets.pdfIn PDF document text
    • https://fakazurirogedim.weebly.com/uploads/1/3/4/7/134743668/8917925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388426/normal_6028847b787aa.pdfIn PDF document text
    • https://cdn.sqhk.co/puxobaku/3gjVfhb/gabuzigupise.pdfIn PDF document text
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/2704527.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/6408828.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/jiier77/shop_empire_galaxy_silver_games.pdfIn PDF document text
    • https://lobepujijas.weebly.com/uploads/1/3/5/9/135966441/496a1.pdfIn PDF document text
    • https://fepepifufom.weebly.com/uploads/1/3/1/8/131872298/4c18b9b5.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/ahbGgiP/block_strike_mod_apk_download.pdfIn PDF document text
    • https://jalaxogazumin.weebly.com/uploads/1/3/4/3/134373329/2f0a594e12c.pdfIn PDF document text
    • https://pekedepak.weebly.com/uploads/1/3/5/3/135399439/d2c92b82c.pdfIn PDF document text
    • https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/pawuvawomovif.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/gizonukorad/berodutubijowixijigaso.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/why_is_my_hp_printer_not_picking_up_paper.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_off0000c2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B8 5864 bytes
SHA-256: b9861d509649ea176075237659f2d7ca03e191dc2c4ade5c936411567f324306
font_01_sfnt_off0000d6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D7 10992 bytes
SHA-256: d96773a28ae0295f1ef10995745bf1bfbf0648fc8a269226a6900a2811094acb

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