Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e09c7d1c5ae539c…

MALICIOUS

PDF

70.3 KB Created: 2021-04-03 18:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 990164b28b730abcd8c1a283dbed906e SHA-1: bce9a2dc27ef5b38bda658373ee1fa0110e2800f SHA-256: 8e09c7d1c5ae539cf0642d7414ed474b2e31348f2be52ddf0a0227679196a0e7
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 likely intended to trick the user into downloading malware or visiting a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/123?utm_term=buildcraft+free++for+android
    • https://static.s123-cdn-static.com/uploads/4456399/normal_5ffac49e14681.pdf
    • https://static.s123-cdn-static.com/uploads/4408871/normal_5ffd9c0a0fc4d.pdf
    • http://gasolotiravizid.sportsontheweb.net/ferotusejilonumosubidokem.pdf
    • https://cdn-cms.f-static.net/uploads/4478683/normal_6011f56ac3fb7.pdf
    • http://pefiworawodud.mypressonline.com/which_is_the_best_software_to_develop_android_apps.pdf
    • http://sijiwepi.mypressonline.com/33993550919.pdf
    • http://witomemu.scienceontheweb.net/55984689304.pdf
    • http://faripofijukevom.mywebcommunity.org/kosizima.pdf
    • https://cdn-cms.f-static.net/uploads/4383791/normal_603166de7c490.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ropugefax.epizy.com/burger_king_gutscheine_2020_oktober.pdf
    • https://s3.amazonaws.com/kuboki/sputnik_sweetheart_summary.pdf
    • https://s3.amazonaws.com/jolunenafobuw/xagalefaxuregunogawaga.pdf
    • http://gupatevefojip.myartsonline.com/12856654831.pdf
    • http://goxunizitemowu.rf.gd/gufef.pdf
    • https://s3.amazonaws.com/bufexa/is_astro_a50_compatible_with_ps5.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_off0000d4e3.bin
f17635a13b7a38835f6b5edd61fcfbb2400be1a3805a44093944f4dc1668afb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E3 4888 bytes
font_01_sfnt_off0000e593.bin
d31906c79f657b43bde4bb3a4ec3eb9ae24f06e59f8ae67698a4f5af34591aeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE593 11808 bytes

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