Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b73232a7bba8ca6…

MALICIOUS

PDF

82.8 KB Created: 2021-02-21 07:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c75d1312009160602d0dc10b38d03e3a SHA-1: 522fe90990ae8d11552abf340863b5eabf547198 SHA-256: 5b73232a7bba8ca66f9fc9c06d5e027f851f01e3deffd8f4b9d77eda2fd261b2
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs and a visual download button. The embedded URL suggests a phishing lure related to game hacks, likely intended to trick users into downloading a secondary payload. The document body, though heavily obfuscated, contains metadata consistent with a PDF generated by wkhtmltopdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=8+ball+pool+guideline+hack+android+without+root
    • https://cdn.sqhk.co/rerunagakiz/M6Jhhji/35841139150.pdf
    • https://static.s123-cdn-static.com/uploads/4376610/normal_5fe2d94db49e8.pdf
    • https://mirexoxufi.weebly.com/uploads/1/3/0/9/130969656/jojafab-niwisave.pdf
    • https://bedejoxinen.weebly.com/uploads/1/3/1/1/131163540/fe15797c6297fbd.pdf
    • https://mogewojelepa.weebly.com/uploads/1/3/4/6/134681452/busojebeg-dabepowopu-sivosifu-zinunefakemu.pdf
    • https://cdn-cms.f-static.net/uploads/4402503/normal_602235bf2ded0.pdf
    • http://mail-autoscout24.net/lepavijumarikasajimufim64cpy.pdf
    • http://rokexulom.22web.org/43222426340.pdf
    • https://cdn-cms.f-static.net/uploads/4456140/normal_6020c0b69e34d.pdf
    • https://static.s123-cdn-static.com/uploads/4471106/normal_5ff028a2813b2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/mogedozara/bashment_riddim_2018.pdf
    • http://wubiwasomiduxi.epizy.com/b_m_application_form.pdf
    • https://s3.amazonaws.com/zuguvoxoki/espen_guidelines_pancreatitis.pdf
    • http://magikid.epizy.com/43988938490.pdf
    • https://s3.amazonaws.com/rawesaragegugar/bosch_washer_dryer_combo_series_6_manual.pdf
    • https://s3.amazonaws.com/ratixifo/esther_hicks_books_free.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b3.bin
a0c966a2a408c623ba1bd99ead56575440461aa1b5ee5b7d91914d5740ab3cc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B3 5436 bytes
font_01_sfnt_off0000f522.bin
2489eb37f44252dff4135bcd2367ee4212b50b6867ad2feae03dfecd94771b41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF522 10560 bytes
font_02_sfnt_off00011994.bin
c3d0ee408bee49a88931d2ac630a9fb52e88a46fabab5a72aa19e78bbe1d3826		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11994 16376 bytes
font_03_sfnt_off00012f3c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3C 4324 bytes

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