Malicious PDF — malware analysis report

Static analysis result for SHA-256 36147c945ba37c84…

MALICIOUS

PDF

66.8 KB Created: 2021-03-29 11:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2550064a451b05c69f65522e66986f79 SHA-1: 210b99d51d8aafad8249c3a1c25afd73299cf11e SHA-256: 36147c945ba37c847d3b31a00be9e8a142c725d32b7fac058d51494df44d826e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature. The document body, though heavily obfuscated, contains keywords that might be used as a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=bonaire+evap+cooler+parts
    • https://cdn-cms.f-static.net/uploads/4413696/normal_60551b946e6be.pdf
    • http://ekzo-fruit.ru/39939272996lqvef.pdf
    • https://cdn-cms.f-static.net/uploads/4474988/normal_60403005c21ed.pdf
    • https://static.s123-cdn-static.com/uploads/4421615/normal_5fcd63986abe7.pdf
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/sekovefid.pdf
    • https://kasexesupa.weebly.com/uploads/1/3/1/4/131437862/062257.pdf
    • http://gutprod.xyz/97899487431d7ftg.pdf
    • https://cdn.sqhk.co/nobipajami/hb2hbhr/jusaberatazibes.pdf
    • https://static.s123-cdn-static.com/uploads/4392193/normal_5feb5d1bebe36.pdf
    • https://cdn.sqhk.co/nezusoxe/geeBMIE/how_to_color_pretty_princess_jasmine.pdf
    • https://static.s123-cdn-static.com/uploads/4480580/normal_5fccb641ad536.pdf
    • http://xaradovopeziwo.22web.org/acute_adrenal_insufficiency.pdf
    • http://winoraama.fun/19531266059qm4ts.pdf
    • https://cdn.sqhk.co/pitekofotada/gjUKHha/70035465941.pdf
    • http://natbeach.space/mefojozibokywd.pdf
    • https://dojiladise.weebly.com/uploads/1/3/1/3/131379401/tuzijetisetegifozedu.pdf
    • https://static.s123-cdn-static.com/uploads/4388839/normal_5fc5ccbed7bbb.pdf
    • https://static.s123-cdn-static.com/uploads/4379231/normal_5fcf5a71ee2aa.pdf
    • http://srakan.space/the_simpsons_scientific_method_worksheet_answers7liiv.pdf
    • https://cdn-cms.f-static.net/uploads/4444110/normal_601df6b5381d8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sajipesexadagon.epizy.com/61548011070.pdf
    • http://gikiwajufekozi.rf.gd/best_functional_exercises_for_seniors.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_off0000ca44.bin
325def54b4674789dcb00b6cc472717c5ac185b0f019c0fef36de64280e184ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA44 5036 bytes
font_01_sfnt_off0000db79.bin
94e035857309b4a73bac6139f24d8a5c140359367272ec3674da899a48563e45
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB79 10200 bytes