Malicious PDF — malware analysis report

Static analysis result for SHA-256 690c55885836e831…

MALICIOUS

PDF

80.0 KB Created: 2021-03-04 03:08:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2ebb29504ce2bdde0e15d139fef75ce9 SHA-1: 92e65e1d788389839b174ed01a4059012d451bd5 SHA-256: 690c55885836e83128fc23affc3a0af2825f7f593076501acf53ae4ce88ad648
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://botokaw.ru/123?utm_term=vermont+castings+defiant+1610+reviews PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459166/normal_6007cbe928b86.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/gPhd40j/68250692845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405650/normal_6028d14f1afc1.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/hjbmbjh/ghetto_wallpaper_apk_2020.pdfIn PDF document text
    • https://poxagubojawi.weebly.com/uploads/1/3/1/4/131482812/0fbe1c8f81a.pdfIn PDF document text
    • https://rebageronamit.weebly.com/uploads/1/3/0/7/130775484/3148a1.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/hhCdE1E/madud.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/VV4Chhc/little_warsaw_poland.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466175/normal_5fe9a3a597210.pdfIn PDF document text
    • http://ruzeviliv.iblogger.org/96901688575.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/hfijsO9/ruduko.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/jjTgf8J/kits_club_africain_dream_league_soccer_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/cdXbGZ1/78872589773.pdfIn PDF document text
    • http://jinoxiresajigeb.iblogger.org/learn_microsoft_excel_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/gunumiku/fgcjdSl/rijugeb.pdfIn PDF document text
    • https://lalibirubifo.weebly.com/uploads/1/3/0/8/130873838/3992904.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://limulusukad.rf.gd/mosoluvasodexegavosegepim.pdfIn PDF document text
    • http://doveweluzabakiw.rf.gd/assamese_video_comedy.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_off0000f654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF654 5772 bytes
SHA-256: 7cd26deaf2cb1bced677009d50d7c341e2edaebdff8ccf8b3b269aa7b632d590
font_01_sfnt_off00010a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A02 11500 bytes
SHA-256: b433e8896ca868863134a295a4585c3c92f136f60567ffd830fdc3121cc7c00d

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