Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c6582b61058c64…

MALICIOUS

PDF

71.2 KB Created: 2020-12-25 05:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 374a89b193427bef8e79ac4bdad872ea SHA-1: 030d72367ea6fdc5cd4342e5d1ebefe7bfb4ce0d SHA-256: 92c6582b61058c642288fb4725505fd46ee61c14d71d29b0711a647f9d78def4
244 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple critical heuristics as a malicious redirector and a link farm. It contains numerous embedded URLs, many of which lead to suspicious or unknown domains, and some point to known redirector infrastructure. The ML classifier and ClamAV also strongly indicate maliciousness, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://gettraff.ru/aws?utm_term=manualidades+de+dia+de+muertos+reciclaje In PDF document text
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/vameped.pdfIn PDF document text
    • https://zurareren.weebly.com/uploads/1/3/4/5/134583426/mazasiregazimek-wopixu-diwab.pdfIn PDF document text
    • https://gitakitopawal.weebly.com/uploads/1/3/5/3/135325500/tawezad_jesuxojuf.pdfIn PDF document text
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/rumekovuba.pdfIn PDF document text
    • https://cdn.sqhk.co/gumoxixo/skjiijd/narcos_cartel_wars_forum_pl.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/9d332512d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e87c958-8e27-4d41-af05-3a8c21823603/on_what_planet_would_you_weigh_the_least.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c0c5501-bc7c-4636-ad72-3961b195d583/rokukef.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/88309202114.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/32433002670.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/wubadirikawejipoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/907be6f1-e069-49eb-be5b-37b719b4f8f5/tajarezopinizejadekar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b878a48-c7a0-4dd0-bb26-4e4b2c2996eb/witoz.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_off0000d75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75F 5168 bytes
SHA-256: 11b68d9899d44e297163a9224d345c54f721a41d8cb081fcd71e64d6c8daba89
font_01_sfnt_off0000e8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E1 11884 bytes
SHA-256: b2182006f098cee333e6c1bb1a6bc8019a5d50ccce4db9ba7f2c5a686086bd01

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