Malicious PDF — malware analysis report

Static analysis result for SHA-256 b081d477db597259…

MALICIOUS

PDF

85.1 KB Created: 2021-03-12 03:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9cb263bf70fa913737f27ef72c91c784 SHA-1: b78901662a25397d88df436b69038ff7b7e02790 SHA-256: b081d477db597259a9e211a22c763f54aa825f9ee69f0ce43ecfd1d0dc3df375
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious campaign, possibly leveraging embedded JavaScript for redirection or further exploitation.

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://dugedepap.ru/award?keyword=avant+garde+movement+in+literature+pdf PDF link annotation
    • https://xasedomag.weebly.com/uploads/1/3/1/0/131071243/2866112.pdfIn PDF document text
    • https://jenisevemib.weebly.com/uploads/1/3/1/0/131070602/9435804.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/1477498.pdfIn PDF document text
    • http://testvvd.xyz/naduzeviwanewebodafovezozki8a.pdfIn PDF document text
    • http://kesisekojabaz.iblogger.org/rational_functions_practice.pdfIn PDF document text
    • http://groby-ritual.online/26153580003jz5fp.pdfIn PDF document text
    • http://pifadopagel.scienceontheweb.net/46805439046.pdfIn PDF document text
    • http://faviwogewe.iblogger.org/divezo.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/51547123970.pdfIn PDF document text
    • http://meveteletav.22web.org/new_construction_home_buyer_checklist.pdfIn PDF document text
    • http://morugufuvak.iblogger.org/can_you_repair_your_heart_after_a_heart_attack.pdfIn PDF document text
    • http://leree4.club/tujidamufev85938.pdfIn PDF document text
    • https://biditojutorosas.weebly.com/uploads/1/3/4/6/134657596/ab61f4c41.pdfIn PDF document text
    • https://kijiwutexaji.weebly.com/uploads/1/3/4/6/134698992/1167908.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_0e67f0caca6941e9bec405e06a957b0e.pdf?index=trueIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_a3d647b091e64f24aed5307246e7e863.pdf?index=trueIn PDF document text
    • http://jipudovisubu.rf.gd/job_interview_what_is_your_weakness_answer.pdfIn PDF document text
    • http://volajigatume.epizy.com/amulya_dj_naa_songs.pdfIn PDF document text
    • http://lugukejuraxa.rf.gd/constructor_plus_trophy_guide.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_off00010f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F82 5232 bytes
SHA-256: 2c469360c626d22990fb6ad95218e20b4d287ac89b219d71c69b6577d2620325
font_01_sfnt_off00012149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12149 11236 bytes
SHA-256: 94f70e351f93e122f9f48c9a53dbe5a9a407f418232b83ae5db5d3aabe82ce03

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