Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c0bad56072c5d1…

MALICIOUS

PDF

79.3 KB Created: 2021-04-04 16:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fdf42277614bcdb1a16ac43ecd9002ee SHA-1: e182b0e7eb5c88d5470f71e66fb2990a5cfc3dee SHA-256: e9c0bad56072c5d1e3daa75f353399bcd7d7e7210d82573e73688e092008b85a
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 hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/strik?utm_term=nitecore+i2+charger+indicator+lights PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385614/normal_6016ebe82cfc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403534/normal_6065f65ec3099.pdfIn PDF document text
    • https://mamafaxugelat.weebly.com/uploads/1/3/0/8/130813750/9201501.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/gggcgc6/tekesivanonexerolikuduf.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/gc7jcgj/34091987226.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/BFtgghi/beam_of_magic_roguelike_heroic_adventures.pdfIn PDF document text
    • https://cdn.sqhk.co/fenajobuwer/iXDgdhe/36799824832.pdfIn PDF document text
    • https://fefaxunitu.weebly.com/uploads/1/3/4/3/134399706/ditemefejunupokat.pdfIn PDF document text
    • https://zovarufegurer.weebly.com/uploads/1/3/4/6/134625168/tepikizivuxi-rekagejateru-furuzaf.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/bjjgeib/bow_weapons_destiny_2_without_forsaken.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/ggKjeK1/dr_driving_game_for_pc_online.pdfIn PDF document text
    • https://cdn.sqhk.co/gubujurit/jfhidFl/60895392949.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477409/normal_5ff8bb71c3dfe.pdfIn PDF document text
    • https://cdn.sqhk.co/gujipiror/if9Drjd/sputnik_virus_iran.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/UaUgijN/chase_zelle_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xabiximakef/hd96wPA/suwuse.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/4geMhe3/gilapu.pdfIn PDF document text
    • https://cdn.sqhk.co/wemavutulow/cmgchdA/street_fighter_uppercut.pdfIn PDF document text
    • https://cdn.sqhk.co/vivupedasez/fjfEja7/faseyha_recharge_viber_number.pdfIn PDF document text
    • https://davavenetu.weebly.com/uploads/1/3/4/5/134500413/wejero.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/jdBQcEc/usa_dating_site_application.pdfIn PDF document text
    • https://wazolupagod.weebly.com/uploads/1/3/0/7/130775763/dajelunebelur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_6022296095eb1.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_off0000f787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF787 5300 bytes
SHA-256: a02f6196c35a9c7f80b12e1bec88e1de5388bed43563fe465699ea54bd83e5e1
font_01_sfnt_off0001098e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098E 11336 bytes
SHA-256: 6d64d603451eb72d17a9d741f58ccfd4c26fe5bbebc104cc862ea8b48c08a177