Malicious PDF — malware analysis report

Static analysis result for SHA-256 8774198340ee38b4…

MALICIOUS

PDF

75.5 KB Created: 2021-03-08 09:55:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e5e173b60c182e63bda38a4509d1af3 SHA-1: 73b2c8c83787e8eac5658192cb6e298f8274c57b SHA-256: 8774198340ee38b4a2110b29df39e4a378735ed64df03b84b278177f5b25b9cb
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as 'Pdf.Phishing.Trojan'. It contains an embedded URI pointing to 'https://vilenefex.ru/wix?keyword=game+maker+2+manual', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a "Game maker 2 manual". No scripts were extracted, but the overall context points to a phishing attack leveraging a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/wix?keyword=game+maker+2+manual
    • https://cdn-cms.f-static.net/uploads/4457006/normal_6045880317e33.pdf
    • https://static.s123-cdn-static.com/uploads/4370547/normal_5fdd995af2896.pdf
    • http://wabukuxinezu.22web.org/elbe_cardan_shaft_catalog.pdf
    • https://static.s123-cdn-static.com/uploads/4406775/normal_5fcbb14100328.pdf
    • https://static.s123-cdn-static.com/uploads/4367912/normal_5fdfb3d852032.pdf
    • http://diranujuwi.iblogger.org/xozezuju.pdf
    • https://static.s123-cdn-static.com/uploads/4388416/normal_5ff916703096e.pdf
    • https://static.s123-cdn-static.com/uploads/4420222/normal_5ff891e5ec6e4.pdf
    • https://cdn-cms.f-static.net/uploads/4374715/normal_60132fd18329e.pdf
    • http://binisamekogona.iblogger.org/annual_credit_report_request_service.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_f5261d9385714e72bf2f8174fa8fa5ef.pdf?index=true
    • http://vesigabeda.epizy.com/83187601273.pdf
    • https://uploads.strikinglycdn.com/files/fb618efc-16d5-4c50-af22-d8069d3cbbb4/35355147579.pdf
    • http://sirowozikuko.epizy.com/66916426141.pdf
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_04cc71571bfc4aaba53625a9109449a4.pdf?index=true
    • http://jiwunix.epizy.com/68121162397.pdf
    • https://uploads.strikinglycdn.com/files/93e341e3-ae0e-4c40-8124-1476865c6a20/brother_hl-3170cdw_not_printing.pdf
    • https://uploads.strikinglycdn.com/files/d1f2a7bd-aac4-44c7-8f75-4ae2cba1b213/62495769990.pdf
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_f389ed00f379460dbd64c88360087f25.pdf?index=true
    • http://lovagijikem.epizy.com/interpreter_of_maladies_quotes_shmoop.pdf
    • http://woporebokut.rf.gd/ziwir.pdf
    • http://kotixetoxuxosa.epizy.com/sears_to_tecumseh_engine_numbers.pdf
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_d0e5c55f96634c6e856103497b5ac8c9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f87f5b8e-4b51-42fc-9730-59f2698ba1bc/gallows_of_madness_review.pdf
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_4c0831801b464e11b5049fdebbf1f3da.pdf?index=true
    • 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_off0000eb35.bin
647a66bdf31cb220c7995789218e569550f129c1fe322b6630dceffa86affc2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 4880 bytes
font_01_sfnt_off0000fbbd.bin
cc3a206e15a2e88e102aa235a198d7a15ea1589cb1c57ca89dd6cc5c377d6061		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBD 10900 bytes

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