Malicious PDF — malware analysis report

Static analysis result for SHA-256 1803c454765701d4…

MALICIOUS

PDF

72.2 KB Created: 2021-02-18 14:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 411f0c738a471105a80629d8b4749154 SHA-1: 8016a9912d6bcb507359552692b2ddf8a4ed97a3 SHA-256: 1803c454765701d4fbca10bd630adcfdc707eb62d96371c6b0d77111f98acede
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to 'social marketing planning process ppt', which is likely a pretext to drive users to the malicious URLs. The presence of external URIs and link farm characteristics strongly indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jottigo.ru/strik?utm_term=social+marketing+planning+process+ppt PDF link annotation
    • http://claire-irk.ru/bluebeam_revu_cost_ukqb4ub.pdfIn PDF document text
    • http://armada.technology/29767004251v9uwd.pdfIn PDF document text
    • http://wijeripe.iblogger.org/game_championship_manager_mobasaka_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiwizi/aHQBibA/41174197274.pdfIn PDF document text
    • http://betabudon.iblogger.org/accme_logo_guidelines.pdfIn PDF document text
    • http://ita-talia.fun/aviva_personal_income_protection_application_form5qtki.pdfIn PDF document text
    • http://b0xberry.online/633899775883actn.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/idW76hc/saginenitijomotajosiru.pdfIn PDF document text
    • https://cdn.sqhk.co/jorafulati/id0Dhbo/bubble_bobble_arcade_game_online.pdfIn PDF document text
    • http://patolul.iblogger.org/49034299652.pdfIn PDF document text
    • http://gaydating.world/309732423408oi73.pdfIn PDF document text
    • http://zumasuxujole.22web.org/guwexutuwufisido.pdfIn PDF document text
    • http://docita.fun/79935698666zc3hu.pdfIn PDF document text
    • http://clebohets.xyz/subutazunokosagup0zduh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zovopabipani.rf.gd/448755827.pdfIn PDF document text
    • http://givoraxanusupe.rf.gd/gotunoponilinizegikezu.pdfIn PDF document text
    • http://pomigipasa.epizy.com/54901586656.pdfIn PDF document text
    • http://momibur.rf.gd/alp_loco_pilot_answer_key_sarkari_result.pdfIn PDF document text
    • http://vazalavowudepip.epizy.com/77293809788.pdfIn PDF document text
    • http://bexotomilobawa.epizy.com/67958764149.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_off0000dceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 5420 bytes
SHA-256: 2f0f612d636a9d17063e14e17f709af638ad91a2430cf65db31733458fd6b115
font_01_sfnt_off0000ef47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF47 10544 bytes
SHA-256: 6c12aa524afc3164091744d858024815ced20480b9c752377739c36a62138796

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