Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7c932d7fe0752f…

MALICIOUS

PDF

83.2 KB Created: 2021-03-30 20:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78d3bba643d1c2f3d82b4f5cf60be476 SHA-1: 4c7cea927276c63ff5cf5d2c4a5c00bb2e6e38ad SHA-256: fa7c932d7fe0752f9b64d7c6fd7696835e767efe9df1644c66f50f6fc3b56698
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. It contains numerous external links, suggesting it's part of a link farm or phishing campaign. The ClamAV detection as Pdf.Phishing.Trojan further supports this assessment. Although no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=spanishdict+possessive+adjectives+quiz
    • https://cdn.sqhk.co/remuzebepilu/hcYVja3/xenajaw.pdf
    • https://cdn.sqhk.co/xogedusov/hcjb61F/48069823659.pdf
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/361d57172.pdf
    • https://cdn.sqhk.co/zapimafe/iRkKhjv/34563261551.pdf
    • https://cdn.sqhk.co/vekuniruf/jdibgfS/lugop.pdf
    • https://misapunuzure.weebly.com/uploads/1/3/1/6/131606411/totagufoxem-vobifem-buvosezup.pdf
    • http://jisetatiloro.scienceontheweb.net/lozuwe.pdf
    • https://cdn.sqhk.co/puvubuzu/ibjj9Kr/586837716.pdf
    • https://cdn.sqhk.co/mezutorixo/LgfgjCO/51839503896.pdf
    • https://cdn.sqhk.co/tenerinirik/icije6L/14288217007.pdf
    • https://cdn.sqhk.co/bogonelemid/ijVjjie/21727167347.pdf
    • https://cdn.sqhk.co/zanivuwiduvo/yVxzugi/how_to_get_superhero_mods_in_minecraft_pe.pdf
    • http://juvovagesubo.mywebcommunity.org/41415439630.pdf
    • http://nukapag.getenjoyment.net/77657423602.pdf
    • https://cdn.sqhk.co/derilunadine/WiaO1jf/71571839715.pdf
    • http://tebogekememesij.mygamesonline.org/58524142237.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_7501e166f6734b29904bd42be43d7de2.pdf?index=true
    • https://s3.amazonaws.com/jenagubadopi/edenpure_a5095_gen2.pdf
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_0d1714574063472a86b2a483e3f01338.pdf?index=true
    • https://69f1164a-dcd3-4310-9fb4-3b67f03bdbb0.filesusr.com/ugd/9d7282_680a571bcb444a9fb49df708b4825b75.pdf?index=true
    • https://s3.amazonaws.com/tazopaju/rorigerimupuxezoverov.pdf
    • https://s3.amazonaws.com/wejuvono/blackmart_apk_app_for_iphone.pdf
    • https://s3.amazonaws.com/masevewi/59051681335.pdf
    • https://s3.amazonaws.com/rutufokedizon/breville_juicer_bje820xl_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed29.bin
42e0192a44b90e29cc118934c7deb710e06827a4f29347f5418aa17a96634dcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED29 5448 bytes
font_01_sfnt_off0000ffc0.bin
9619b080d21b2a3fc2425565e2ede396ef63dff94a69fca29f6c7eb2d885934f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC0 12016 bytes
font_02_sfnt_off000127b5.bin
c6d15a48544a3bb55b86c8e7bdd0e7cb70a7a2427dd0dd016b970b4b8641d415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127B5 16128 bytes

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