Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbcbc357f2b9f362…

MALICIOUS

PDF

83.3 KB Created: 2021-03-13 20:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d987da53c778660f59233b0bb5ccf336 SHA-1: 7b1cbfa877f134e589623b0f2859eab2d313f152 SHA-256: cbcbc357f2b9f3623ae9de3c012d6b89585bbbcfd7cf3619c6eea63bfb35fa9b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'seumenha.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a 'leveling guide', indicating a potential lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://seumenha.ru/wix?keyword=wotlk+arms+warrior+leveling+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377410/normal_5fccafe2ee4ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_603ead945ab1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391024/normal_601b522335cbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370309/normal_5ffda1568840f.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/72138264374.pdfIn PDF document text
    • http://pugorot.mygamesonline.org/tewutobelodokamidux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443810/normal_602142388c73a.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/how_to_use_smeg_self_cleaning_oven.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/powermate_5000_generator_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/davawina/chrome_network_tab_response_format_json.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/ditovusisoputodoj.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/rimuzovikufupuwobazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe404b04-2a1c-457a-a86c-5785066152ab/battleheart_legacy_2_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c35e68-76b2-4fd4-989a-c4dc5e037020/remadilewunivevamelimipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea6f13a9-9a55-430a-89eb-8c12b4b9a134/nebexabexij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c24e4b1-057b-42c2-b8c0-848282c0afe8/67950699743.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/69552382913.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF868 5256 bytes
SHA-256: a9c22fd2cc0e6aac4e57426b76473aa3a2875bdc8c29e7bbb8e0d6d52c08ea2e
font_01_sfnt_off00010a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4A 11160 bytes
SHA-256: 3513dcb640697adf9d5dd0977eee5749e161829690630eff50882c224347d8e2
font_02_sfnt_off00013058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13058 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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