Malicious PDF — malware analysis report

Static analysis result for SHA-256 174d2221fd6b0b2a…

MALICIOUS

PDF

79.7 KB Created: 2021-03-14 22:22:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b58c4c4c61e4ad7368190ee5fe276e9 SHA-1: dd2f1d4cef5a98199152eec649359927c4735730 SHA-256: 174d2221fd6b0b2ab68fae3c25de19c96c38f46d74c7d608b93a27d9725f8d91
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to disposable hosting, suggesting a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://pelibifir.ru/wix?keyword=half+elf+half+orc+dnd+5e
    • https://sekitajed.weebly.com/uploads/1/3/1/3/131383533/jizepilogusuteg.pdf
    • https://cdn.sqhk.co/rotuzuwibi/wYXhihf/cat_evolution_clicker_tapps_games.pdf
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/labuzozok-lonezus-gubuw.pdf
    • http://kamefutebiwef.mywebcommunity.org/24605061118.pdf
    • http://nituzovido.getenjoyment.net/konusolo.pdf
    • https://cdn-cms.f-static.net/uploads/4458829/normal_60149f0d842f7.pdf
    • https://cdn.sqhk.co/fegibidizog/2jcudgg/39433696231.pdf
    • https://cdn.sqhk.co/kufagilan/KzUjhUV/best_punjabi_video_status_for_whatsapp_download.pdf
    • http://mosebuzixat.mywebcommunity.org/34604757895.pdf
    • https://cdn.sqhk.co/pizililiv/j9ibheD/mod_ben_10_apk.pdf
    • https://nukogakulezov.weebly.com/uploads/1/3/1/3/131378840/76fd6b652.pdf
    • https://cdn-cms.f-static.net/uploads/4445869/normal_5fd34ef0730fc.pdf
    • https://ritosameb.weebly.com/uploads/1/3/4/2/134266106/9232081.pdf
    • https://cdn-cms.f-static.net/uploads/4369916/normal_603b91c160175.pdf
    • http://zabemaladameg.medianewsonline.com/xoziloxo.pdf
    • https://cdn.sqhk.co/kapideto/Chghdhj/hang_gliding_costa_rica.pdf
    • http://bawazofo.getenjoyment.net/how_to_program_vivint_element_thermostat.pdf
    • https://xofiguguja.weebly.com/uploads/1/3/2/7/132710561/kodugagitabanugufe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zodererezuzuxi/kufavepelaritomixe.pdf
    • https://uploads.strikinglycdn.com/files/35d7bb3a-7d13-4800-bb85-d89e44141e55/cost_to_renew_ak_drivers_license.pdf
    • https://uploads.strikinglycdn.com/files/97141dfd-89a1-4505-96a9-e0791910377d/lights_out_with_david_spade_season_1_episode_2.pdf
    • https://uploads.strikinglycdn.com/files/2a23b957-85bd-4523-a7e3-f4c74220439e/91397951145.pdf
    • https://uploads.strikinglycdn.com/files/80bafe92-c64e-42d5-b8ca-ed48e4c9100d/how_to_change_your_keurig_2.0_water_filter.pdf
    • https://s3.amazonaws.com/vososasoxumete/84212115884.pdf
    • https://s3.amazonaws.com/nelizenejakarug/bohemian_rhapsody_piano_sheet_music_piano.pdf
    • https://s3.amazonaws.com/tetenifeme/how_truthful_is_the_crown_season_3.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb0a.bin
7a2bedcf32b89f19f8a50d0aa41799057f6993b0fc956cb4c6beed38612673e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 5016 bytes
font_01_sfnt_off00010c16.bin
c063748e66a4ef7db24160dc4472edc54875b6c9d0d0ee882bbb4fd6167c886e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C16 11052 bytes

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