Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b566dc600fffd9c…

MALICIOUS

PDF

77.7 KB Created: 2021-04-06 16:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c689f6350c1948de4d889cbfad3aa942 SHA-1: 573ae0b1c2484a8d8a64f1dfe6f197de58ec1b1d SHA-256: 7b566dc600fffd9cb6a51c5e79331c7e82aedcbc5f20407f85644d33590230ca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://soxebez.ru/strik?utm_term=furiously+happy+book+club+questions PDF link annotation
    • https://cdn.sqhk.co/wudawagirus/NRhehdL/66291198000.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/8OBhf3Y/93879911536.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/2d_battle_simulator_modm092f.pdfIn PDF document text
    • http://smm-target.ru/you_are_not_so_smartjm2jz.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwisagilevi/hfidFge/96401208592.pdfIn PDF document text
    • http://petrol-v-pol-price.site/ford_focus_2003tb9m5.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/jihjOFI/fruit_ninja_apk_old_version_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/ihejdgc/fighter_jet_simulator_games_online.pdfIn PDF document text
    • http://peludofnor.fun/godezosipaxirejiwafakebxaip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dadibon.epizy.com/q_see_qt_view_app_for_iphone_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cec5271-4b01-46b6-a430-e811746b2814/does_sonic_use_soft_serve_ice_cream.pdfIn PDF document text
    • http://notaruk.rf.gd/97916359726.pdfIn PDF document text
    • http://foboganezebalo.rf.gd/glassworks_opening_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/454ef37b-0a37-4243-91d0-3037f6554a6a/what_is_chaos_theory_in_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa96d20-abab-483f-a642-1b30e980096e/pvc_5_stand_shooting_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a80cccf4-08e5-4427-8b2e-bf306774faa5/heat__glo_fireplace_remote_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fc453b8-546d-4f81-addb-e62901555669/45324441634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce138a35-8d5b-43c5-8b13-3e420a78415b/magufuxoselodewon.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_off0000f32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32C 5408 bytes
SHA-256: 485bca7ff2908d7541a1bc4a7402effefe662951f4341f730e25b458157f0652
font_01_sfnt_off00010590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10590 10448 bytes
SHA-256: 58c9d8f655d78cbc0bbaf7c90f75097af5ce8a24e94ed6cb5e9dd5e376fb2eb2

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