Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca558c64384160c…

MALICIOUS

PDF

76.7 KB Created: 2021-03-24 22:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8f3ac3d55437290d47f81def4e2fbd8 SHA-1: e2579c31f57cac9909a500fbc9b48ffdccddad9a SHA-256: 9ca558c64384160cf15f17d6e91cee99467455c8227a75babae86b98b55bba66
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, with a high concentration on disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though partially garbled, contains text that appears to be a lure for a video song, which is then linked to a malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/123?utm_term=benaam+rishta+woh+video+song
    • http://rasprodavaika.ru/35484911010tkfdh.pdf
    • http://guxiket.iblogger.org/pepipokofobasuxulojenefip.pdf
    • http://navaram.online/how_to_load_pellets_in_a_760_pumpmasterqzqte.pdf
    • http://mexuloxuxinona.iblogger.org/revidedajozavazijetigetim.pdf
    • http://pisibebix.22web.org/66231099795.pdf
    • http://xazoxewimimo.iblogger.org/increase_self_esteem.pdf
    • http://wiinorama.website/natidimekexiwabobiselasimmemj.pdf
    • http://sanatoriy-izumrudny.ru/seiko_solar_chronograph_v172-0ac04bli9.pdf
    • http://rovepofaji.22web.org/48987513640.pdf
    • http://site-shop.xyz/what_not_to_eat_on_a_dairy_free_dietwhlws.pdf
    • http://tesar-krd.ru/ableton_10_crackbpvy1.pdf
    • http://firstflirts.site/logitech_k400r_keyboard_driver_downloaduw5et.pdf
    • http://nuveclovet.xyz/xaremaruvisiwosuwuwadco.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e8d57f0a-fdbd-440a-b4c3-eda082f764ed/norisobagidefugi.pdf
    • http://tuwafuvokix.rf.gd/unitized_curtain_wall_details.pdf
    • http://zudosikewemer.epizy.com/4962414687.pdf
    • https://uploads.strikinglycdn.com/files/085b7159-8bc3-4da4-b22a-74c51d0b7c74/55405311050.pdf
    • http://nimimetebevazi.rf.gd/cause_and_effect_essay_examples.pdf
    • http://refaruzevogot.epizy.com/kenmore_elite_smartwash_quiet_pak_9_he4t_error_codes.pdf
    • https://uploads.strikinglycdn.com/files/eabd8238-016f-45a9-b5c3-ca32fcd37558/avaya_1416_phone_labels.pdf
    • http://litezopufesox.epizy.com/21771653540.pdf
    • https://uploads.strikinglycdn.com/files/cd036b2e-9f24-4800-b448-f1dc28f8e764/deguw.pdf
    • http://rukodulaban.epizy.com/bodumiba.pdf
    • https://uploads.strikinglycdn.com/files/e8b143b7-237a-432b-abb3-e809d67ceb3c/why_is_my_excel_sheet_scrolling.pdf
    • http://pewizofiwerobep.rf.gd/video_uncle_ato_dzi_dew_rejoice.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_off0000edd0.bin
49c9f54822135dbcf77c32a42b418b6f6714c54542404703021a1260f4d43c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD0 5408 bytes
font_01_sfnt_off00010022.bin
6d40889f5eed904e9eb884b2090f59dba3dcf5af130503222b182a76c12e2baf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10022 11440 bytes

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