Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c20b8e1c7d12666…

MALICIOUS

PDF

86.3 KB Created: 2021-03-25 16:57:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7369dbd0ece8b3602b7f92efdcefccf2 SHA-1: 753468ef6801326e083162380c66902b11d2c1ba SHA-256: 6c20b8e1c7d12666177c2e45b8b3cb175b287c77ae3ba15ced06598567059069
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are likely used to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=how+would+you+describe+converse+all+stars
    • https://cdn-cms.f-static.net/uploads/4412902/normal_604db35a4b2aa.pdf
    • https://rilulozopofebu.weebly.com/uploads/1/3/1/4/131406258/jejoxasavomasozoxew.pdf
    • https://tavabaxo.weebly.com/uploads/1/3/1/0/131071290/1896454.pdf
    • https://static.s123-cdn-static.com/uploads/4488323/normal_5fec4811a5c98.pdf
    • https://pawunotapi.weebly.com/uploads/1/3/1/4/131408062/8406525.pdf
    • https://static.s123-cdn-static.com/uploads/4379601/normal_5fdcbd96eec91.pdf
    • https://cdn.sqhk.co/jarixizotib/dmhdkif/tanglefree_decoys_canada.pdf
    • https://cdn-cms.f-static.net/uploads/4408594/normal_5fdbd38e3d19f.pdf
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/juxura.pdf
    • https://cdn.sqhk.co/lukumuzu/Q57ggji/63263423368.pdf
    • https://cdn.sqhk.co/vefuwatak/gehe1Gr/86063065710.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_322c6619bf0d493d91efc9e23cf981af.pdf?index=true
    • https://s3.amazonaws.com/lopadivupudexa/37070081451.pdf
    • https://s3.amazonaws.com/xupimaral/writing_and_signing_of_the_declaration_of_independence.pdf
    • https://s3.amazonaws.com/tikofaketonub/gobidar.pdf
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_fe06e18188714d13beb09169ee43677c.pdf?index=true
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_c922c950ba144cb291694a40eb28a12e.pdf?index=true
    • https://s3.amazonaws.com/fodose/21675806372.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_off0000fe28.bin
2d3c476c13a7ece63b5adee52dce923ca0ac730ba57b216b2cc8b0ecba6cbcde		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE28 5288 bytes
font_01_sfnt_off00011047.bin
a5f0e74b9aa920ba03503324fc591394ec73f531b41abd0e3764c2eb6ee4bdc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11047 11344 bytes
font_02_sfnt_off00013773.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13773 16092 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.