Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bc16f92a953747…

MALICIOUS

PDF

79.1 KB Created: 2021-04-02 09:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86f6f1ad60223ba8b5be19f795274c30 SHA-1: 908c999dd3caf3a780b043e4eb208655af99d009 SHA-256: 93bc16f92a9537471a050a179ed2cf832fa70d5c43990d3eb31aca7de808c8fc
104 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier assigned a high probability of maliciousness. The document body, though heavily obfuscated, contains references to 'root explorer apk free download' and the embedded URL 'https://golowaki.ru/wix?keyword=root+explorer+apk+free+download' likely serves as a lure to download a malicious application. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://golowaki.ru/wix?keyword=root+explorer+apk+free+download
    • https://cdn.sqhk.co/vefomatakin/cjiJtWP/how_to_make_origami_animals.pdf
    • https://static.s123-cdn-static.com/uploads/4411493/normal_5fe31320db680.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • https://cdn.sqhk.co/wovenebi/ETKha2v/gadilakoduxux.pdf
    • https://static.s123-cdn-static.com/uploads/4384472/normal_6002fbbfac37e.pdf
    • https://cdn-cms.f-static.net/uploads/4494889/normal_6063165bc0239.pdf
    • http://saudiautoinsurance.com/56269716748s1kb3.pdf
    • https://cdn-cms.f-static.net/uploads/4413701/normal_5fea42e560dee.pdf
    • https://static.s123-cdn-static.com/uploads/4406241/normal_5fc6c2218638a.pdf
    • https://cdn-cms.f-static.net/uploads/4446286/normal_5fe6f337429d0.pdf
    • http://graatorama.fun/2001_club_car_ds_parts_manualbus0j.pdf
    • https://cdn.sqhk.co/dizukenepu/hNtoSUT/28825560557.pdf
    • http://tehnoprom.org/xazofileguj59boc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_45b3bf47e44146c987b6a92343c6b756.pdf?index=true
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_21b2078a64534d909073ee1e1c467fe2.pdf?index=true
    • https://s3.amazonaws.com/nevovumowa/machine_movie_background_music.pdf
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_b3f95850df184fd08bf46574a5677c21.pdf?index=true
    • https://s3.amazonaws.com/pibajuwi/full_text_book_of_enoch.pdf
    • https://s3.amazonaws.com/gogoxowiniza/17414229122.pdf
    • https://s3.amazonaws.com/pukiza/goat_simulator_split_screen_xbox_360.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_off0000f093.bin
5f7cc0cf92c426208eef9ac04bfc4efd159131a14261dd1d8c7273527d021f8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF093 5088 bytes
font_01_sfnt_off00010212.bin
f4729949b514d7d3a85f9866f11bd6feb7e851d665a00e14fe1e4667bdf088de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10212 15104 bytes

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