Malicious PDF — malware analysis report

Static analysis result for SHA-256 d636d58344c722a9…

MALICIOUS

PDF

75.1 KB Created: 2021-02-17 18:37:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d6962340b0b5a88d75dccae0c00b2e6a SHA-1: 462da651831cce7e242ad93657c636495f63a7c0 SHA-256: d636d58344c722a923096e1608a1b51605b7312f934bc6e6857ef98126574dc2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/aws?utm_term=how+to+start+a+lab+introduction PDF link annotation
    • https://cdn.sqhk.co/fuludasowipu/Aojeja7/katidowedusadu.pdfIn PDF document text
    • https://bavifevip.weebly.com/uploads/1/3/6/0/136049805/3298a37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413016/normal_5ffc150b7151e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490274/normal_5fd04d8aed004.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/jcZghib/war_of_galaxy_apk_download.pdfIn PDF document text
    • https://tinonerapize.weebly.com/uploads/1/3/5/3/135349756/1795330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_600dc61c4303a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459624/normal_602a97b8baabc.pdfIn PDF document text
    • https://vuloninufe.weebly.com/uploads/1/3/4/0/134012437/jukidabaworo.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/CicmVjd/23004097467.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/7JVDjhy/1481654297.pdfIn PDF document text
    • https://duzajitoji.weebly.com/uploads/1/3/2/6/132680922/2655398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_6018689d2d9e1.pdfIn PDF document text
    • https://livesagu.weebly.com/uploads/1/3/1/4/131437401/fegusoxijopo.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/jhLjdbm/overkill_drill_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/gdribSL/97644359210.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/magapeguwabe/83814024559.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/70929315044.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE915 5128 bytes
SHA-256: 2f0613a872d1f047003966d832368797f43c2eed8a53e53257cc0b9e1e6e91a2
font_01_sfnt_off0000fa9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9D 10696 bytes
SHA-256: f58516333908d8d416ad7c62a03d700cfc007d1438904695c095b6aa64f0fdd5

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