Malicious PDF — malware analysis report

Static analysis result for SHA-256 652f0f8829baf84b…

MALICIOUS

PDF

135.2 KB Created: 2021-03-17 15:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9d6d1ba0325de88d9e4d421dc2116aad SHA-1: ed7bcc95ac65779a2e19969a0acf5d5493da5733 SHA-256: 652f0f8829baf84b3b82216aba48ba48e0abbb9eb4b402b96a97e9c943dc295b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or redirection scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a link farm on disposable hosting, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/award?keyword=jurnal+gametogenesis+pdf PDF link annotation
    • http://fitnesspack.net/novela_solovino_el_perro_equivocadotoly7.pdfIn PDF document text
    • https://tojumofudino.weebly.com/uploads/1/3/2/6/132681199/nuzoburas_fejebozepoj_dazapetijolovid.pdfIn PDF document text
    • https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/jofobo.pdfIn PDF document text
    • https://kesegupopu.weebly.com/uploads/1/3/4/1/134131766/bejaxijenirepifen.pdfIn PDF document text
    • http://chtotakoeverti.biz/what_is_trial_lawvx44j.pdfIn PDF document text
    • http://erogan24.website/car_parts_finder_app74wp2.pdfIn PDF document text
    • http://sollabs.xyz/kebetesiboditifixiwekimel0sjei.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rifezovepon.rf.gd/mewawofagegovazefujodil.pdfIn PDF document text
    • http://vatekovinewuwa.epizy.com/eric_chou_when_we_were_young_lyrics_eng.pdfIn PDF document text
    • http://vegexiwijije.rf.gd/gre_test_practice_online_free.pdfIn PDF document text
    • http://fevumuweli.rf.gd/atp_challenger_tour_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c30eacfd-f0e6-47f3-8fff-ed0f71658c1b/31480616393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a4c892-7c95-4e36-8581-b354e7eb982c/el_futbol_a_sol_y_sombra_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e617493e-3cc7-471c-b4dd-1bc555b0c5a0/89494977744.pdfIn PDF document text
    • http://gavejovep.rf.gd/what_is_opportunity_cost_in_economics.pdfIn PDF document text
    • http://vuwepimu.epizy.com/answer_key_mpsc_clerk_typist_2017.pdfIn PDF document text
    • https://doi.org/10.19027/jai.8.77-89In 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B475 1612 bytes
SHA-256: 187182448d5cd6d4dc0e38017bda31356bc960b92e152922fb72abee47c556f2
font_01_sfnt_off0001bc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC82 5348 bytes
SHA-256: 4013cb61b2536e2e80fbd11156816d75a2ad7757c7f47293fb556e0373989672
font_02_sfnt_off0001ce99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE99 13648 bytes
SHA-256: 2397ae1a58f5af03b7fad331ed94f825c25c8af4d693fdb3b0a228476df9273f
font_03_sfnt_off0001fa3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA3A 16072 bytes
SHA-256: e8220701f4abc5c2578c6b81392a5eb74511f2628282971200dd586ef0f811f3

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