Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad38c0caff98e15…

MALICIOUS

PDF

71.2 KB Created: 2021-02-19 13:33:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 40959b3f38ab70d15c370af94ed3ba8e SHA-1: 4c2c9e9d980b696d5de80df2855e97461c3aee52 SHA-256: 2ad38c0caff98e151cf56557536e4601c7413c3a0176d0ebd7f193982b1a62ca
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of external links, many pointing to disposable domains and Weebly hosting, indicating a link farm or phishing operation. The embedded URLs suggest an attempt to redirect users to potentially malicious sites, possibly for credential harvesting or malware distribution.

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://leonvi.ru/123?utm_term=plantronics+explorer+500+specifications PDF link annotation
    • https://rebodegumirimak.weebly.com/uploads/1/3/0/7/130775130/vodalesigobowet-pojite-juvolewegugejun.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/hPhegfS/63227456394.pdfIn PDF document text
    • http://olymp-trade.top/camtasia_8_free_trial7n440.pdfIn PDF document text
    • https://xejuxomezul.weebly.com/uploads/1/3/1/6/131637030/d095fd.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/1601182.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/hidSLMo/95636293188.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/jhbwWKA/london_to_brighton_bike_ride_2019_route_map.pdfIn PDF document text
    • http://prodson.fun/happy_birthday_brother_memen3584.pdfIn PDF document text
    • https://dutumeparozawa.weebly.com/uploads/1/3/1/1/131163590/5417d313942b6f.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/ifvjjjh/battlefield_play4free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/a2Hgghu/tecno_spot_application.pdfIn PDF document text
    • http://vashastrahovka24.ru/rimafugirigolo33t7a.pdfIn PDF document text
    • https://zegosonov.weebly.com/uploads/1/3/4/1/134109065/8662897.pdfIn PDF document text
    • https://naketutetan.weebly.com/uploads/1/3/4/6/134660231/wajimagojerukar-mipebaxix.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_off0000d825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD825 5344 bytes
SHA-256: 6e578f35b0c8788b6a200511c7d8ca3b3ff31517abc3dcd6647150d6ae202a68
font_01_sfnt_off0000ea6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6C 10964 bytes
SHA-256: 943bf0ac42e27eb9f621b72869b54b13e58a03bec1f70b0ceb3995f0bccf22bb

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