Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb22607a47322202…

MALICIOUS

PDF

222.4 KB Created: 2021-03-23 20:10:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e8fa4728c77977a560ec469877408047 SHA-1: 777a55febbce91ef03e072dbf097cb87609253a0 SHA-256: fb22607a473222024b583ba4c8426f8c2b488c8f8a6e359f45845eeb428398db
144 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of a 'Clipboard command execution lure' heuristic indicates the document likely instructs the user to paste commands into a shell, a common technique for executing downloaded payloads. The embedded URL suggests a potential download source for such a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9845

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/award?keyword=chemistry+form+4+notes+all+chapter+pdf PDF link annotation
    • https://kawotubizon.weebly.com/uploads/1/3/1/8/131871780/9849972.pdfIn PDF document text
    • http://car-den.ru/98080317115k50o0.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/iaigjbI/dragon_wars_full_movie.pdfIn PDF document text
    • http://paktum.pro/79990979402bp5op.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413703/normal_600549bc5d983.pdfIn PDF document text
    • https://cdn.sqhk.co/wujodazera/iemhdDe/cbse_class_11_maths_syllabus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463010/normal_602a97f9242c2.pdfIn PDF document text
    • https://firudofomupavu.weebly.com/uploads/1/3/1/3/131384713/b95b4024be29a.pdfIn PDF document text
    • http://tryadasert.online/amsco_apush_20185x4i9.pdfIn PDF document text
    • http://copyrighthelp.info/dls_2019_hack_apk_modqphvf.pdfIn PDF document text
    • https://cdn.sqhk.co/miwiwefe/0khjcig/26793909676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_6014f256e449b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_601ecc0f13df0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448332/normal_5ff9c4027d005.pdfIn PDF document text
    • http://shoop-fm.ru/disovi8vkml.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425211/normal_603262dbb1303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_60496b2060419.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/8423399.pdfIn PDF document text
    • https://ganubidorebe.weebly.com/uploads/1/3/2/7/132740923/fidutel-fixixizefim.pdfIn PDF document text
    • https://salotoniv.weebly.com/uploads/1/3/5/3/135305201/1585700.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00032d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D3B 5488 bytes
SHA-256: 98921d20f7ee6c3c4b3b45c97e5c2fe9fbffa33f4822e24d5281d8435259d6ff
font_01_sfnt_off00033fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33FC2 12368 bytes
SHA-256: 32988774e4713ffacde07021a3260263981dbda52b383c380c281195b8e24a9c

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