Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6312aef83a4798…

MALICIOUS

PDF

78.7 KB Created: 2021-03-31 22:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 214fb59ec5fb605dc7858dc057475661 SHA-1: ed364825709095e0ebac4cb91722eb35d5ca6d74 SHA-256: cc6312aef83a47987395fbeca94ffcf1111dee3cfd185135d0a901c3e5fdbd91
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 hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/123?utm_term=casual+formal+shoes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420915/normal_5fe1469c40399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465924/normal_6009e6d6d033b.pdfIn PDF document text
    • http://rolevuses.iblogger.org/beating_the_odds_jump_starting_developing_countries.pdfIn PDF document text
    • https://foxisejolod.weebly.com/uploads/1/3/4/6/134626470/merewakovevovejiniri.pdfIn PDF document text
    • https://zekilunadaxidub.weebly.com/uploads/1/3/4/6/134631079/3fcb1633b.pdfIn PDF document text
    • http://gusuketip.22web.org/sezejipuduxafawun.pdfIn PDF document text
    • https://jewelalebun.weebly.com/uploads/1/3/4/5/134585336/pulebanavoralifod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450040/normal_604320a665e5c.pdfIn PDF document text
    • http://muzoc.xyz/storytelling_with_data_nussbaumer237p3.pdfIn PDF document text
    • http://apsmall.space/titans_curse_full_booksxkds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462339/normal_60288a3b3cfd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427274/normal_6023e752ea2a0.pdfIn PDF document text
    • http://iglivesupportteam.com/zamusakuraraborez19x64.pdfIn PDF document text
    • https://dodemitewiv.weebly.com/uploads/1/3/1/3/131380707/kesakoxesi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lidorozina.rf.gd/signal_processing_and_linear_systems_b._p._lathi_1998.pdfIn PDF document text
    • http://nowozogep.epizy.com/21010732856.pdfIn PDF document text
    • http://jojofolarimema.epizy.com/brief_principles_of_macroeconomics_9th_edition_n._gregory_mankiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30570fd8-d927-4ace-ae74-ac58aa63d7cf/dd_curse_of_strahd_death_house_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f9d6c64-b522-4610-993f-e33a127c329d/el_pollo_loco_double_chicken_avocado_salad_with_dressing_calories.pdfIn PDF document text
    • http://pubupamosala.epizy.com/macbeth_comprehension_questions_and_answers.pdfIn PDF document text
    • http://dodujorumapide.epizy.com/livestock_management_system.pdfIn PDF document text
    • http://ragakinetepufub.epizy.com/ap_module_grade_9_ekonomiks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16f677f-af80-4076-bbd3-33a81d52aec9/a_discovery_of_witches_season_1_episode_6_recap.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_off0000f447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF447 4912 bytes
SHA-256: 8b6d39b6676e64867b9a264f4bf47358ce94fc090a813dbeca4f3a2cda62239f
font_01_sfnt_off000104c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C9 11844 bytes
SHA-256: 2be158e99767d13c1b8ff8f9b032b8fdb28c8a3c0d13bd27234123b6bec8364a

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