Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0bde3b6be7c0907…

MALICIOUS

PDF

76.6 KB Created: 2021-03-28 19:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab6e3d6f04f50e6c018a6db8f431ef5e SHA-1: abaff70b9f8da29bac6463df348b8bc877f79ce5 SHA-256: c0bde3b6be7c0907e9d3854df6101130fe20514fe5bc1e7ab6cd696b555ec8b9
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 a suspicious domain, which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, suggests a technical topic to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/award?keyword=deflection+of+cantilever+beams+solved+problems+pdf
    • http://japarof.mywebcommunity.org/tatifizibuwosegokumizumi.pdf
    • https://cdn-cms.f-static.net/uploads/4455174/normal_5fd127e5a1018.pdf
    • https://cdn-cms.f-static.net/uploads/4450247/normal_5fe9769549568.pdf
    • http://bodatajusabobof.22web.org/how_much_do_priests_get_paid_uk.pdf
    • http://pivolirarorip.mypressonline.com/how_many_tournaments_on_the_european_tour.pdf
    • https://cdn-cms.f-static.net/uploads/4416302/normal_6059cc6416325.pdf
    • http://nuloriwilorij.scienceontheweb.net/17440083748.pdf
    • http://wegoluxetas.scienceontheweb.net/aeolian_processes_and_landforms.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://setuvufijub.epizy.com/2534587716.pdf
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_2fb36a0de28b4010b2d0a2d419246217.pdf?index=true
    • https://s3.amazonaws.com/gopuze/lubeban.pdf
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_f211ce642b0547c286e52936c67d368a.pdf?index=true
    • https://s3.amazonaws.com/megujobemegor/42982712361.pdf
    • http://kepawomokatuke.myartsonline.com/what_are_all_the_buttons_on_the_xfinity_remote.pdf
    • https://9eff4bf0-55a5-42b9-a65a-250f23c32afd.filesusr.com/ugd/80978b_7a8db0641cd4419d926212c0498dbb78.pdf?index=true
    • http://kuwemujureza.epizy.com/teoria_del_bienestar_social.pdf
    • https://s3.amazonaws.com/bexolamabad/titazomatukek.pdf
    • https://uploads.strikinglycdn.com/files/49242a76-7572-45e6-bf0b-9f0fbed6bddc/safagukapejewabutari.pdf
    • https://67389751-14cc-4ed3-b660-7ef7239e4cc3.filesusr.com/ugd/bb5584_522035e2034d41fa8fef82374fbde2f9.pdf?index=true
    • https://56a79910-2d97-40e4-a1df-bca3b17021d7.filesusr.com/ugd/2721fc_3aa137b573344234a13639b825a8c6c8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e73638d6-06b4-4a8f-b64a-c064c1f8f5df/bowomojameven.pdf
    • https://s3.amazonaws.com/sezebepit/83763141551.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_off0000ebd7.bin
bfc82f88b26258e6ae80b43d2cdb88e0d4602262aeeb37f0f541358de11d36cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD7 5500 bytes
font_01_sfnt_off0000fe84.bin
141f2b96f7912093570d1102658a50fbfa8b72d0e175662d40f826c3e85fb6fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE84 11244 bytes

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