Malicious PDF — malware analysis report

Static analysis result for SHA-256 79211b02167f2ce7…

MALICIOUS

PDF

80.1 KB Created: 2021-05-11 22:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e1fe24c6093071a10bced9ff2576cda SHA-1: 851996a7f142c3b198fe018ad08429544c2e58bd SHA-256: 79211b02167f2ce7847cdc82a6ac5462a8a0d9a94977b9ca90b2d25269ccae2a
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with one prominent URL pointing to 'seumenha.ru' and a deceptive query parameter suggesting a career development topic. This pattern is consistent with phishing or malware distribution campaigns that use social engineering to trick users into visiting malicious sites. No scripts were extracted, but the presence of multiple external links and the overall classification strongly suggest a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=good+career+development+goals+examples+for+software+engineer
    • https://dibasipelop.weebly.com/uploads/1/3/0/7/130738559/8250702.pdf
    • https://cdn.sqhk.co/xixofivib/ijjuBif/55068750942.pdf
    • http://gejepixaso.iblogger.org/company_profile_sample_format_in_word.pdf
    • https://cdn.sqhk.co/nakokixega/fM2gfhf/77189122494.pdf
    • http://sigipotewal.22web.org/jazitidedejisoz.pdf
    • https://ziwoduva.weebly.com/uploads/1/3/4/8/134856062/96e1544.pdf
    • http://lupapezatuna.22web.org/30788842687.pdf
    • https://cdn.sqhk.co/xelajuwodaf/0shehg0/magic_piano_mod_apk_2._8._3.pdf
    • https://cdn.sqhk.co/rifokinimito/Wk4bojb/59771326487.pdf
    • http://fijigud.22web.org/russian_grammar_book.pdf
    • https://funovupudejo.weebly.com/uploads/1/3/4/4/134473131/mekomugekulofi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sejanaxopuvogiw.epizy.com/osha_flammable_storage_cabinet_grounding_requirements.pdf
    • http://renimip.rf.gd/10429800641.pdf
    • http://pirigebosagome.rf.gd/cardiologia_nuclear.pdf
    • http://dovudegumigisaw.rf.gd/extended_essay_reflection_guidelines.pdf
    • http://punegejofuj.epizy.com/play_gba_games_online_free_no.pdf
    • https://uploads.strikinglycdn.com/files/febcdee1-b132-453d-8411-f014b463ecf5/53178137802.pdf
    • http://familule.epizy.com/destination_a1_a2_free_download.pdf
    • http://wevikokuzufos.epizy.com/abhimaan_songs_mr_jatt.pdf
    • http://zazuxidavo.rf.gd/apsrtc_bus_pass_application_form_for_ngo.pdf
    • https://uploads.strikinglycdn.com/files/22c8c239-5113-4cdd-a1a9-0dcc36a782e0/how_much_does_ac_service_cost_at_valvoline.pdf
    • http://gaviluwex.rf.gd/bank_po_exam_preparation_material.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1e.bin
5545616b2c8371d2d2bf7852d7787de6288dd567788f9c617d2bdb1dbc3fc2c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 5724 bytes
font_01_sfnt_off0001009c.bin
80d444d32ffd7da7cdeb8c16b7fe79720da2e8c2e902a0ee5acd201cc68a224d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1009C 3120 bytes
font_02_sfnt_off00010d22.bin
dc410f66479e99a05f5170f56c29cac635c44b7222d0b7339f02a6f3a46d60ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D22 10788 bytes

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