Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02f362b45828834…

MALICIOUS

PDF

72.3 KB Created: 2021-03-15 22:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9e0e7e0efaab968edab062ad481775e SHA-1: d522524f6d7029da76e83afcf37574f747c041a1 SHA-256: c02f362b4582883444516fc28c0379bedd5f35544d02cb0acbdd2e47ab00894b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a suspicious URL that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/wix?keyword=brio+primo+base+manual
    • https://zobigitesi.weebly.com/uploads/1/3/4/6/134691723/xegobenobe.pdf
    • https://static.s123-cdn-static.com/uploads/4443598/normal_600026a167470.pdf
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/597279.pdf
    • https://fiwobezamarevev.weebly.com/uploads/1/3/2/7/132740324/a68711b017.pdf
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/1e866dde12ab4dd.pdf
    • http://xufamorazogubov.sportsontheweb.net/paxiluv.pdf
    • https://riwurarelix.weebly.com/uploads/1/3/4/4/134484082/6231303.pdf
    • https://cdn-cms.f-static.net/uploads/4412159/normal_60335c7bb2278.pdf
    • https://nepejudakolop.weebly.com/uploads/1/3/4/8/134876169/mofiti.pdf
    • https://static.s123-cdn-static.com/uploads/4478378/normal_5ffb127b4a402.pdf
    • https://zotamitogimida.weebly.com/uploads/1/3/0/7/130775261/jakowuluxugofotavodu.pdf
    • http://pelabinowoguk.getenjoyment.net/printable_t_shirt_template.pdf
    • https://static.s123-cdn-static.com/uploads/4369143/normal_5fff7c93f0dad.pdf
    • https://static.s123-cdn-static.com/uploads/4450724/normal_5fc8363c86d7e.pdf
    • https://tivufotevomok.weebly.com/uploads/1/3/2/6/132682035/910673.pdf
    • https://nuvawusop.weebly.com/uploads/1/3/5/3/135302159/245828def52708.pdf
    • https://kenojulovananav.weebly.com/uploads/1/3/4/0/134016885/9171855.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_7a843e4560304f2eacbac1ee2bfe19b5.pdf?index=true
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_eeef0db72466485cb12cf1b36dec1e10.pdf?index=true
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_8919ea2d208f4d738900055a97368240.pdf?index=true
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_23fa2f62fb3447f6bd8ece9d13f67395.pdf?index=true
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_e2a37b4213b649ed9f888daaf6fc7fbb.pdf?index=true
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_fb8d9c0b53ea4ae2ad26e72922e3f4ee.pdf?index=true
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_6bd68b9df7bc44b4b9c78a3937ea2bb4.pdf?index=true
    • http://gixopiv.onlinewebshop.net/is_the_28_day_keto_challenge_worth_it.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df3b.bin
f3250a562e6294dd313778db692c8ac1068a85e1039a4d38457ff8424e677cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3B 5152 bytes
font_01_sfnt_off0000f0a3.bin
94b3d3c1626103127e9aa07429e1fcda47561aaba1edb37845800865c888f237		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A3 10392 bytes

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