Malicious PDF — malware analysis report

Static analysis result for SHA-256 8513eab86bc9bf61…

MALICIOUS

PDF

80.0 KB Created: 2021-03-17 05:33:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3ed9015f7a2aa1334c458fdd82695546 SHA-1: 8499f250767bd47184426fe928b55826d39c9ab1 SHA-256: 8513eab86bc9bf6199808598e12ef95a5fe68b8ff5044aa00bb44d53578713e9
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and external link farm are indicative of a malicious document designed to redirect users to potentially harmful sites.

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
  • 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://maypoin.ru/strik?utm_term=chinese+text+to+english+translation PDF link annotation
    • http://jabewes.medianewsonline.com/belajar_coding_untuk_pemula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420260/normal_6048a3ccde7f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401519/normal_6035630e933bd.pdfIn PDF document text
    • https://cdn.sqhk.co/podidiwi/fmAFiag/53818009760.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/9418211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_603ea8fb8783b.pdfIn PDF document text
    • http://paxebuli.iblogger.org/jinja_include_template.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/best_on_acorn_tv_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490369/normal_5fd6c64d91d06.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/ijdR2hh/girl_war_z_hacks_pc.pdfIn PDF document text
    • http://jarisudowapebi.sportsontheweb.net/wugirujusapodok.pdfIn PDF document text
    • https://jatomotubaw.weebly.com/uploads/1/3/0/7/130739460/ratibodaga_zajumupa_pojopazejawasat.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/72708406030.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/ikmohhn/negakurot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475016/normal_604f8a5eb5b92.pdfIn PDF document text
    • https://cdn.sqhk.co/moturira/cihByjj/18251809927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471250/normal_5fe791955cdff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368223/normal_5fe02aae2d728.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mobukug.myartsonline.com/que_es_la_anemia_macrocitica.pdfIn PDF document text
    • http://dupofax.rf.gd/dwarf_fortress_adventure_mode_cheat_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC34 4824 bytes
SHA-256: a6efb91999a6cea83ae2c1bac099f90d70723f8eb7c62ace1000ee89a2c2df71
font_01_sfnt_off0000fc8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8B 12312 bytes
SHA-256: e40752e17e2e552070b539938fe452f7dc55c2c20cfc856abb93133b6e399638
font_02_sfnt_off000124ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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