Malicious PDF — malware analysis report

Static analysis result for SHA-256 77af19de05b1ecd0…

MALICIOUS

PDF

79.9 KB Created: 2021-02-02 17:29:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57e587861cf95146f8df1d6a925c7538 SHA-1: e73201850ee8492ca3d58414f334dd9e41814837 SHA-256: 77af19de05b1ecd04c1560935e0a7d7c0e603f81eb79cdbe35ce7a6499c13156
104 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a phishing page or malware. The presence of urgency language in the document body further supports a phishing or social engineering attack vector. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crophysi.ru/aws?utm_term=volume+booster+iphone+free
    • https://lijimoxa.weebly.com/uploads/1/3/0/9/130969704/pimavakuto-bivulubuzumixa.pdf
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/tikotebovo.pdf
    • https://static.s123-cdn-static.com/uploads/4479904/normal_5ffc76323eb37.pdf
    • https://fupebabo.weebly.com/uploads/1/3/4/6/134601971/dobizimujodumetiniw.pdf
    • https://cdn.sqhk.co/regavebike/dgdjdhb/83164224058.pdf
    • https://static.s123-cdn-static.com/uploads/4393502/normal_60002b0e6e472.pdf
    • https://static.s123-cdn-static.com/uploads/4393220/normal_5feb8d9e4b06e.pdf
    • http://rajebamif.22web.org/rapalifigaxirobu.pdf
    • https://joninotabuxid.weebly.com/uploads/1/3/5/3/135387421/5dee3afa0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rezopokus.epizy.com/gubofeziw.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_off0000d815.bin
48b50bb57ff912feb0035a85c5dc71ac94187d388ba908270beceebda9c70c71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD815 5036 bytes
font_01_sfnt_off0000e906.bin
6ef1c95e29050fe3d4c80c3b4a5d21b791029f1360baf797e1393985e1278324		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE906 2600 bytes
font_02_sfnt_off0000f417.bin
27390d50a9328de092ca24d1c12a6774cc2478241b83929a9a00b3a3f944db35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 11352 bytes
font_03_sfnt_off00011b05.bin
f3b95f1269985bafc3dfb9b5b35e76df8a4d57039a143c013aed99c7cf3a4a89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B05 16344 bytes

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