Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2653cdc1e9701e2…

MALICIOUS

PDF

80.5 KB Created: 2021-04-05 10:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 459cbca9af30ef76b5947cc5503bf0a4 SHA-1: 7a52ee26a84f5c87726f722b88227d4dbe7bb7e6 SHA-256: f2653cdc1e9701e22e825609a89d767a13d73409a87295cf3b31d934e37e547d
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to gardening, which is a common tactic for phishing or malware distribution. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=how+to+plant+butterhead+lettuce
    • http://sunugukumota.getenjoyment.net/japokosiwiwijik.pdf
    • https://static.s123-cdn-static.com/uploads/4501233/normal_60075abccc9fb.pdf
    • http://legalvictory.group/pogigabusolisitaporiauic.pdf
    • http://libuwapuvewipev.mywebcommunity.org/fipodapovorisi.pdf
    • http://stnold.com/52747248835r2hn3.pdf
    • https://cdn-cms.f-static.net/uploads/4474450/normal_604b432d11821.pdf
    • http://makamar.xyz/dubupapxr565.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_bdebf0de01c7440b9c2ea194ca0d15ed.pdf?index=true
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_1111eb8073514f6fafe83368c8755b73.pdf?index=true
    • http://vesazunexupeva.epizy.com/wevitesuxigadaferukevig.pdf
    • https://uploads.strikinglycdn.com/files/bf59694d-7994-4b0a-b0fb-4f06c31b8f20/pc_dictionary_english_to_hindi_download.pdf
    • http://roveramo.atwebpages.com/how_to_use_sketchup_for_free.pdf
    • http://wogosozado.rf.gd/lg_vrf_error_code_ch_05.pdf
    • https://uploads.strikinglycdn.com/files/b34ff297-9e5d-4f56-879b-6f4860303e60/how_to_clean_mr_clean_spin_mop.pdf
    • http://rizolejebogu.epizy.com/fagugujemog.pdf
    • https://uploads.strikinglycdn.com/files/95600745-be1d-4773-bf61-03222ae10d3e/simevug.pdf
    • http://nipugizanevowo.rf.gd/1574910002.pdf
    • http://bebovufuvuji.myartsonline.com/simple_ceiling_pop_design_booklet.pdf
    • http://kotixetoxuxosa.epizy.com/job_application_cv_format.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_off0000fdca.bin
7f50813f1c04e1351ae325e4ef5e17874e2d5d0558eaab26b8e80f03c171f989		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCA 5176 bytes
font_01_sfnt_off00010f66.bin
ffa41c1be4f5f40a7b2a8101660687dc9e970bba444ca5eb87a08a5519e384df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F66 11004 bytes

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