Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f65ce8d8466705…

MALICIOUS

PDF

69.3 KB Created: 2021-03-24 13:21:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 234664ec315febfc0cd08cd697c70b10 SHA-1: 30352796910c36a50a335b03a53116532d9c3c46 SHA-256: a5f65ce8d84667050c0d7b97e9bfd50e34362ac5cc746d04513ea9fc1be8b2a4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'xajibur.ru', which is likely part of a phishing or malware distribution scheme. The document body, though partially corrupted, suggests a lure related to 'Alexander the great mini-q document f answers' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/wix?keyword=alexander+the+great+mini-q+document+f+answers
    • https://cdn.sqhk.co/kavejufa/MhdMhbZ/tap_counter_game.pdf
    • https://static.s123-cdn-static.com/uploads/4379029/normal_5fe231724784c.pdf
    • https://lelusujizuzu.weebly.com/uploads/1/3/1/4/131438438/gixoporuzebabon.pdf
    • https://cdn.sqhk.co/goronikel/hfgfshe/racing_fever_moto_apk_mod_revdl.pdf
    • https://cdn-cms.f-static.net/uploads/4483354/normal_603c5753de90a.pdf
    • https://cdn-cms.f-static.net/uploads/4458635/normal_603a144835b27.pdf
    • https://cdn-cms.f-static.net/uploads/4458616/normal_603fbaaf35bb7.pdf
    • https://pemilixip.weebly.com/uploads/1/3/5/3/135330450/2197609.pdf
    • https://cdn-cms.f-static.net/uploads/4485012/normal_600a4e8d1269b.pdf
    • https://cdn.sqhk.co/zotofoza/iihhgid/90730847507.pdf
    • https://cdn-cms.f-static.net/uploads/4367000/normal_600f88732558b.pdf
    • https://cdn.sqhk.co/riwifesineji/jhhjJgd/74676762349.pdf
    • https://static.s123-cdn-static.com/uploads/4411932/normal_5fffd4f0c10ec.pdf
    • https://cdn-cms.f-static.net/uploads/4462035/normal_602c677a37643.pdf
    • https://cdn.sqhk.co/bexamajuw/hhhgcih/mandel_browser_premium_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0ed2b747-005e-4ac2-836c-0f4544cd6fc1/26946002831.pdf
    • https://uploads.strikinglycdn.com/files/ce8c1e18-9ff7-4ec4-b005-83b1014ee450/music_notes_drawing_tattoo.pdf
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_e39e92bff6ec4ae18494e3ca5d652ef4.pdf?index=true
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_325fc510046c4a4ba46df7877e16cac4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/486ff568-041d-46df-8da6-4a1937efe80a/64660952205.pdf
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_17bf0679358b4930b297ab9dd752ae55.pdf?index=true
    • https://uploads.strikinglycdn.com/files/28e828b7-7d10-4c24-a5ec-e22d59893c6c/bowasisajilewajeda.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_off0000cf9a.bin
bdc078b916990853a04d31cc34e03ef2eb7cef752e071b2205681efeae1e683d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9A 5744 bytes
font_01_sfnt_off0000e310.bin
6840ba944c9aa6807a9f8263b9221aa0098eb43c35264b6599aabed8e26caace		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE310 10704 bytes

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