Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb8f672dbf205b2…

MALICIOUS

PDF

95.8 KB Created: 2021-03-17 02:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8c00d87ffcf0d7bf82e54130c714794 SHA-1: b0245ece994095159f130defccaba30dac7c6b29 SHA-256: ddb8f672dbf205b2d31a6dab4ccf895e3ea29f33d7eb9338d060d40bdc05f1f9
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://vilenefex.ru/123?utm_term=chuck+taylor+all+star+high+top+platform', which is likely the primary malicious destination. The document body, though heavily obfuscated, contains text related to 'Chuck taylor all star high top platform', suggesting a lure to disguise the malicious intent. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://vilenefex.ru/123?utm_term=chuck+taylor+all+star+high+top+platform
    • https://cdn-cms.f-static.net/uploads/4408713/normal_601c7edda2d62.pdf
    • http://rozefuzapotor.iblogger.org/felososagiwileper.pdf
    • http://tafiwon.mywebcommunity.org/husqvarna_240e_chain_size.pdf
    • http://yewes.space/jazzy_power_chair_parts_and_accessoriespc225.pdf
    • https://static.s123-cdn-static.com/uploads/4446166/normal_5fdcc454ea298.pdf
    • https://cdn-cms.f-static.net/uploads/4426699/normal_5fd9369f1aa66.pdf
    • https://cdn-cms.f-static.net/uploads/4484143/normal_6050066f1b1ed.pdf
    • http://1offpark.xyz/2266296450bt4hg.pdf
    • https://static.s123-cdn-static.com/uploads/4460231/normal_5fdcceeeadc3d.pdf
    • https://static.s123-cdn-static.com/uploads/4497685/normal_5fc7e0a7c6dd6.pdf
    • http://revilokepudidu.mygamesonline.org/netters_anatomy_flash_cards_online.pdf
    • https://cdn-cms.f-static.net/uploads/4382208/normal_6015ab1ce9f95.pdf
    • http://sibogufurab.medianewsonline.com/story_elements_pretest.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://mejizemobimoli.epizy.com/46799798765.pdf
    • https://uploads.strikinglycdn.com/files/0cfd4f18-b630-4d27-9ed9-e652ffa49929/19923770307.pdf
    • http://dovunufesesiz.onlinewebshop.net/what_is_the_salary_of_a_automotive_technician.pdf
    • http://vomixogofin.rf.gd/apodemus_sylvaticus.pdf
    • https://uploads.strikinglycdn.com/files/19851854-33b3-41ab-9a44-64cd8f13bd5b/james_stewart_calculus_8th_edition_solution_manual.pdf
    • https://uploads.strikinglycdn.com/files/b5fb69f6-1c64-4a56-915e-778d56ad106f/char_broil_big_easy_recipes_pork_ribs.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001093c.bin
5f5b9b448286b6c859b23acd7644ae580198ae5ec1431d70f135976a618cad11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1093C 5276 bytes
font_01_sfnt_off00011b37.bin
207272ec7a549724eb69dfba1825ab70021699e9df6e9efa0f0cfffe63f4392b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B37 2332 bytes
font_02_sfnt_off0001259f.bin
4739ee59954432a98c2258690f4e0b39f90ec127716db6b6edcaf8590f520bd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1259F 11864 bytes
font_03_sfnt_off00014de2.bin
0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE2 16168 bytes
font_04_sfnt_off000162e9.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x162E9 4324 bytes

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