Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c9177434ac671f…

MALICIOUS

PDF

81.2 KB Created: 2021-03-24 03:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68a8f775323fc46b21e76fbc9e0d66ae SHA-1: bc4df872a8b30a733703639c6668a152a096b5c9 SHA-256: 60c9177434ac671fa7ccb01a769c51aa4df272dd7ec099c2dd517d4d9685a074
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the link farm structure suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=grand+chase+apk+data
    • https://cdn-cms.f-static.net/uploads/4451227/normal_6050021a0efa2.pdf
    • https://cdn-cms.f-static.net/uploads/4366389/normal_60116ecac3729.pdf
    • https://static.s123-cdn-static.com/uploads/4459166/normal_5ff0cbd9b8e7b.pdf
    • https://cdn.sqhk.co/vedukosamo/esgfrjb/pc_gaming_wallpaper_1920x1080_hd.pdf
    • https://static.s123-cdn-static.com/uploads/4403270/normal_5febc5bde9c97.pdf
    • https://cdn-cms.f-static.net/uploads/4454289/normal_6011df7fb4f4e.pdf
    • https://cdn-cms.f-static.net/uploads/4465252/normal_604423bd3f328.pdf
    • https://cdn.sqhk.co/dagorabowixu/gcjashg/18367262108.pdf
    • https://cdn.sqhk.co/wojidumezu/uijwjjh/quicksave_app_for_instagram.pdf
    • https://cdn-cms.f-static.net/uploads/4414868/normal_603a5018042da.pdf
    • https://cdn.sqhk.co/luginuwi/eQhws9p/heart_rate_monitor_app_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_0f87b9b29d724a71807dc00bc6b475f9.pdf?index=true
    • https://s3.amazonaws.com/ladojenefe/toy_defense_2_hack_mod_apk.pdf
    • https://63d876aa-455f-4c41-9c38-50747f3e0b95.filesusr.com/ugd/a220d5_49663a8b5b9e4604bc82c2b72749d1fc.pdf?index=true
    • https://592f3795-292b-4eb7-bb82-ca7d83343d16.filesusr.com/ugd/44d997_e86d104e9910485989300449c68babf1.pdf?index=true
    • https://6438efa2-cbc3-4905-bec7-85cdafd94a34.filesusr.com/ugd/d1cf8b_ff94d6e2bc4d4746a8f0976e68ae1de2.pdf?index=true
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_43efcccac9774e008e0f8281d5ed1a62.pdf?index=true
    • https://s3.amazonaws.com/tosego/woneduzuvedafuzar.pdf
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_b7e6850dfba84dc585c1945774be07d1.pdf?index=true
    • https://s3.amazonaws.com/likerajatob/37362104184.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_off0000e440.bin
5c2d831f1f82fc30754176efa700e7cf5e764d796b1e2f7c24702ccd13442cd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE440 5224 bytes
font_01_sfnt_off0000f604.bin
14c0c25f385efb9f3bf8f280a2edf6f20df5c3c42ff35570558ecd59a7451cc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 14004 bytes
font_02_sfnt_off00012179.bin
8bbddaf60692503e8cc66b8fa98398ec32f1fb20d26f947a75cab71ed701e41d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12179 16396 bytes

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