Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f5f5e146165784…

MALICIOUS

PDF

87.8 KB Created: 2021-03-05 07:08:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9778c86fdf29633b12c0386602f8c984 SHA-1: 08570ca504da1609443735dbdb533336d1f778dc SHA-256: 72f5f5e146165784d7b9c3431b10744b234a21fdbca9a96686602df5a0fe7b69
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the document is designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/123?utm_term=5+minute+crafts+bad+girl+vs+good+girl PDF link annotation
    • https://cdn.sqhk.co/ludibipimilu/cjbhdxP/hearts_of_iron_sabaton_live.pdfIn PDF document text
    • http://krokoboko3.xyz/bekizaflebf.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/jb1jhgg/ivar_the_boneless_actor_partner.pdfIn PDF document text
    • http://interbankdigital.com/rozaginakupesovojipusak3a57k.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/uiiibvk/dunk_shot_2k19_battle_hit_agl.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/P2icBx9/virus_and_bacteria_difference_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/sugefixa/GhfihHk/80386414068.pdfIn PDF document text
    • http://uk-delfin.ru/gukorudasiza6u7au.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/heQUibo/arcade_fun_ball_roller_skee_bowling_balls.pdfIn PDF document text
    • http://cafechorsu.ru/zizopetmgjxi.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/PrjjcGf/kexapit.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/Q0vghhb/82498903320.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/jeHjatQ/vegan_birthday_cake_recipes_easy.pdfIn PDF document text
    • https://cdn.sqhk.co/repejuvovod/qgjggic/lovoj.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/hjAGThb/92647082142.pdfIn PDF document text
    • http://persequen.com/44675336661huhjn.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
    • https://s3.amazonaws.com/safago/95311034346.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/febrile_neutropenia_treatment_guidelines_nccn.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/canada_visitor_visa_application_form_online.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/baidu_hotspot_setup_free.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/fadil.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/namijujas.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_off00010b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2F 5452 bytes
SHA-256: 028cd1f4053e2e4aad16d5e33b37abdee1fc8c32ac7efa91120ef232d2dce80d
font_01_sfnt_off00011d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D97 11584 bytes
SHA-256: 01104fd2a52b443dcbf07b759aaeb8249cf5faa5b32b402b4f1e7c995ad7778e
font_02_sfnt_off00014357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14357 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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