Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c22a256c26cd334…

MALICIOUS

PDF

76.2 KB Created: 2021-03-13 18:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c13b5075332331e0c7b704785d600dc8 SHA-1: 71b6c978590baa866cf55aa61c7fd2a4ada0891a SHA-256: 0c22a256c26cd334eba30d2973ee591d7839913c509c2e48698be818d276594a
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain. ML classifiers and ClamAV detections strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. The PDF structure itself does not contain executable scripts, but the presence of the external URI is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/123?utm_term=amapiano+dance+videos++2019
    • https://cdn-cms.f-static.net/uploads/4493597/normal_5fe7bef73033f.pdf
    • https://static.s123-cdn-static.com/uploads/4367281/normal_5fc720a6e643a.pdf
    • http://foodguideblog.com/line_6_firehawk_fx_multi-effect_pedalfr1ni.pdf
    • http://kfcrabota.ru/milk_adulteration4u6to.pdf
    • https://fegopamaxu.weebly.com/uploads/1/3/4/8/134896151/nipimig.pdf
    • http://lexamopelezun.mywebcommunity.org/38901332.pdf
    • http://gimemuwet.mypressonline.com/annamaria_testa_la_pubblicit.pdf
    • https://cdn.sqhk.co/fuxiwimemo/ghrjaih/89119963254.pdf
    • http://trokot-new.online/how_old_is_the_ipod_nanocev1m.pdf
    • https://cdn.sqhk.co/nudadubuju/Pjbu0ic/pdf_file_application.pdf
    • http://twenty-promo2020.ru/givonoejmk4.pdf
    • https://cdn-cms.f-static.net/uploads/4460066/normal_6029306a8601e.pdf
    • https://cdn.sqhk.co/jukusenefow/aVgiAgd/merchant_of_venice_quotes_and_techniques.pdf
    • http://creamspait.xyz/evaluation_sheet_for_training_programvj2a7.pdf
    • https://sizezowupoje.weebly.com/uploads/1/3/4/7/134704467/f4f9a80a.pdf
    • http://mon-compte-cmb.best/6720930212307rip.pdf
    • https://cdn.sqhk.co/sozodumupof/ieaELig/stickman_rope_hero_2_mod_apk_techylist.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jupegojut.atwebpages.com/71536768048.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_off0000e8b8.bin
87c9a61e682eebc7583349a74e0d764f32c2d55e7a5a13924314d65a23dd4961		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B8 5620 bytes
font_01_sfnt_off0000fbcf.bin
e670b805e880a7a67d0e25c8d6760a0c0a887747e7b7d919fb957d6bebea0f76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 11404 bytes

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