Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b6394f72866e537…

MALICIOUS

PDF

79.9 KB Created: 2021-05-11 08:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38ff84288d6b4d82f3285251d39640b1 SHA-1: d1db95bc384c9c5be51c7a0ec51d39c3137cb20d SHA-256: 3b6394f72866e5375916a1ec85af886303900fe5c513ac107ab65605d590d4a9
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to academic or technical content to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://kuzutuzo.ru/strik?utm_term=group+theory+in+political+science+pdf
    • http://lnstagramverifiedsbadgeforms.com/33922292425gtz20.pdf
    • https://cdn.sqhk.co/wuvakumo/WFgcRge/block_puzzle_games_free_download.pdf
    • http://chtotakoeverti.biz/ge_water_softener_gxsf30v_manualy3wxa.pdf
    • http://goproonly.com/standard_of_excellence_book_2_trumpet6pcsx.pdf
    • http://crystal-light33.ru/spider_man_cartoon_animated_seriesqg1z9.pdf
    • https://cdn-cms.f-static.net/uploads/4467318/normal_6027a2c557d5a.pdf
    • http://komarovskii.xyz/witisokapenirifubuwuztba7o.pdf
    • https://cdn-cms.f-static.net/uploads/4371786/normal_601c6722464c1.pdf
    • https://static.s123-cdn-static.com/uploads/4495385/normal_5ffebc28e2cbe.pdf
    • https://cdn-cms.f-static.net/uploads/4465688/normal_6068923e209fb.pdf
    • https://cdn.sqhk.co/dopiporajen/hxyhjof/nicki_minaj_songs_download.pdf
    • https://cdn-cms.f-static.net/uploads/4486763/normal_6031dbce797ba.pdf
    • http://testrun.ru/96153542556yvfpc.pdf
    • http://italonewsero.site/2012_chevy_impala_transmission_for_salek01ad.pdf
    • http://bigmagazin.xyz/wasosijavunofapapu7wa86.pdf
    • https://cdn-cms.f-static.net/uploads/4459787/normal_602791c1e44bd.pdf
    • https://cdn-cms.f-static.net/uploads/4466153/normal_604a7aeddb9c2.pdf
    • https://cdn.sqhk.co/zezovajav/gEXiaji/dalolisatipibipusevumaxad.pdf
    • http://usene.xyz/rift_no_hdmi_connectionsypca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/dc1e4c4a-4906-4368-b306-55373ba22ccb/big_nate_stays_classy_read_online.pdf
    • https://uploads.strikinglycdn.com/files/9a23e7b6-d104-41cf-b0e6-8a750b83317c/karl_kopinski_sketchbook_free_download.pdf
    • https://uploads.strikinglycdn.com/files/46404e17-9c06-435e-a8ef-02ecf3d92437/20069229948.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf3.bin
b779258a761e4e922a1d112f9db91c7859a4c1ada1dc764bb6ee1619ec880e6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF3 5256 bytes
font_01_sfnt_off0000fcd8.bin
30b3c898561b6e85c5bc7adfd8c12d023079e867b41a39060e69b568bd069497		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD8 11408 bytes
font_02_sfnt_off00012278.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12278 4324 bytes

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