Malicious PDF — malware analysis report

Static analysis result for SHA-256 f643ec18e8e93cf0…

MALICIOUS

PDF

76.1 KB Created: 2021-04-15 20:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc7c4a0ea0ac6ae71507dfd711d701e1 SHA-1: c0fbf31c06d63752dc79a4faa7644ce6678bbc1a SHA-256: f643ec18e8e93cf0138f92eb97f871ef6c0ea3efdc5ffcfeda9dfeeb93d43478
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting an attempt to redirect users to malicious sites. The presence of these links and the overall structure indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=rosemount+1056+sensor+wiring
    • http://wonizojaru.scienceontheweb.net/ludwig_van_beethoven_biography.pdf
    • http://vavexefane.mypressonline.com/ace_online_test_series_gate_2020.pdf
    • https://static.s123-cdn-static.com/uploads/4368266/normal_5ffdecde9454f.pdf
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/2233284.pdf
    • https://likifovufuli.weebly.com/uploads/1/3/4/5/134588617/8923012.pdf
    • https://cdn-cms.f-static.net/uploads/4477139/normal_601172358a127.pdf
    • http://kitafoged.medianewsonline.com/where_does_it_say_in_the_bible_that_god_gives_us_free_will.pdf
    • http://gejesixave.scienceontheweb.net/advocare_24_day_challenge_food_guide.pdf
    • https://cdn-cms.f-static.net/uploads/4444644/normal_60230e2ed0de7.pdf
    • https://bakinoxeveraj.weebly.com/uploads/1/3/0/9/130968963/6284960.pdf
    • https://cdn-cms.f-static.net/uploads/4457000/normal_605819a5ca6cf.pdf
    • http://shortsomfj.space/como_cambiar_de_pulgadas_a_milimetros_en_inventorm2yc0.pdf
    • https://vekaforu.weebly.com/uploads/1/3/4/7/134747957/2250413.pdf
    • https://cdn-cms.f-static.net/uploads/4414852/normal_601ab0689a634.pdf
    • https://vesabigixovo.weebly.com/uploads/1/3/1/8/131857304/favutujirifezit.pdf
    • http://sanatoriy-izumrudny.ru/how_to_remove_glacier_bay_faucetao7j3.pdf
    • http://xalowazejadiv.getenjoyment.net/57688162855.pdf
    • http://digtalcaliper09.xyz/what_kind_of_battery_does_a_nissan_key_fob_takea0t7c.pdf
    • http://copyrighthelpbusiness.net/831398147187vv20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_89c01253703446a9ad3c45ee6e3dea07.pdf?index=true
    • https://a4ae9d37-b6e9-49cc-beb7-9e0af2956346.filesusr.com/ugd/87b9a8_688afb08e6d04828aeb7e985f4f04667.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddd7.bin
c32f434f7bf061a22ca3691a21bca873428b5999b100770a73912bd3e6dac863		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD7 5216 bytes
font_01_sfnt_off0000efa0.bin
0c227bd42fe9b1d369b872a3ff5ab636b29ef3af761c14a0725eb304e0fb0aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA0 10964 bytes
font_02_sfnt_off00011519.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11519 4324 bytes

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