Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be11a3db1e5b001…

MALICIOUS

PDF

98.2 KB Created: 2021-03-16 18:19:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a75f5da4dbc51fdbce6d8b70b3363fe SHA-1: 5d2f0e41e41a377d333701452cc07042dacc6781 SHA-256: 8be11a3db1e5b001a5e9ef308ce664f27a48f194011580736257b2979485baf3
166 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many hosted on disposable domains, indicating a link farm or redirection strategy. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document's purpose is to trick users into believing they need a password for an archive, a common tactic for hiding malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://xezojetit.ru/123?utm_term=breviario+de+alarico+pdf
    • https://fabevapomuwi.weebly.com/uploads/1/3/4/6/134607330/genubixuvugubusani.pdf
    • https://static.s123-cdn-static.com/uploads/4382972/normal_5fc5f555bd191.pdf
    • http://tadugebakonuged.getenjoyment.net/42265784308.pdf
    • http://mosebuzixat.mywebcommunity.org/how_much_does_it_cost_to_repair_a_ds_lite.pdf
    • https://cdn.sqhk.co/zutomina/agghbjf/mn_vikings_game_highlights.pdf
    • https://cdn-cms.f-static.net/uploads/4444114/normal_6015b89a4852c.pdf
    • https://puwegamojone.weebly.com/uploads/1/3/4/7/134702565/lisaguge.pdf
    • https://cdn-cms.f-static.net/uploads/4416513/normal_602ef7cf64363.pdf
    • https://piximemob.weebly.com/uploads/1/3/4/3/134371032/508537.pdf
    • https://cdn.sqhk.co/watexoba/gSWhcf6/candidiasis_en_hombres.pdf
    • https://cdn.sqhk.co/zimopiroxab/jaSgsib/lunopebemigub.pdf
    • https://vidimepimexuja.weebly.com/uploads/1/3/4/6/134626803/9331573.pdf
    • http://gepexoliv.medianewsonline.com/lg_aircon_error_code_ch_02.pdf
    • http://wugupomovupa.sportsontheweb.net/varizipejivufetivupe.pdf
    • https://cdn.sqhk.co/zikufivol/eUvLhjt/xovabani.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://simolerifape.epizy.com/knot_tying_kit_australia.pdf
    • http://lojurixerura.epizy.com/blank_map_of_the_world_showing_continents.pdf
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_8f0cd6e193844efeb5fdbea7c928c263.pdf?index=true
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_b260073e676643d98adc0d7e69dcf106.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b0b.bin
7cc8d36f46d6a361265ff785f7a5e7e94a162a4a925db7d3fa33629747a345d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0B 5080 bytes
font_01_sfnt_off00013c72.bin
312afc58367ea044a8c18b84689f9c14e303d014e4c9287e60bb2e017765b954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C72 12492 bytes
font_02_sfnt_off0001640e.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1640E 16204 bytes

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