Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3833dd6ea19b70…

MALICIOUS

PDF

79.0 KB Created: 2021-04-02 13:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d24bd23f087323c88a29c2818d94505 SHA-1: 1544b9379276ed1d3c045ccddbf94cfa981bba84 SHA-256: 9c3833dd6ea19b708d03450b0889eece5506ff52d9089f00c130bee14242b554
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating an external URI, specifically 'https://zajinet.ru/strik?utm_term=what+documents+do+i+need+to+get+my+cdl+permit'. This URL is presented in a context that suggests a phishing or social engineering attempt, likely related to obtaining a CDL permit. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect the user to a malicious site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://zajinet.ru/strik?utm_term=what+documents+do+i+need+to+get+my+cdl+permit
    • https://static.s123-cdn-static.com/uploads/4425514/normal_600317f9e92f2.pdf
    • https://cdn-cms.f-static.net/uploads/4465938/normal_60599b6ad29b6.pdf
    • https://cdn-cms.f-static.net/uploads/4456143/normal_6056fde5736bf.pdf
    • http://nibajafij.medianewsonline.com/machine_learning_algorithms_basics.pdf
    • http://xukosususif.medianewsonline.com/bisarolorexo.pdf
    • http://komomutuba.22web.org/8727138290.pdf
    • http://kulofokugizadeb.22web.org/xolakeku.pdf
    • http://xuzobinemipivor.mygamesonline.org/focusrite_18i8_power_supply.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://keguwaburafokul.epizy.com/wuvikibuvekepisebaderepux.pdf
    • http://bijalefopate.rf.gd/pubatuw.pdf
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_cd4c1b37fcd44391a9bcf4e7b3b61770.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c3fbda99-30ef-475f-94a0-3f0270a44daa/4549903641.pdf
    • https://uploads.strikinglycdn.com/files/f16a66f8-d2fe-4efb-adb6-020c86420e50/13137901313.pdf
    • https://39dd5e1d-a581-41ec-a80f-9e19245c660f.filesusr.com/ugd/c2656d_6ebd65cd391f4282b4d470cb82f8f145.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2cc80231-2e6f-4f5f-957b-3f241d82cd43/how_much_are_diaper_genie_refills.pdf
    • http://bejevevofo.epizy.com/deguraxi.pdf
    • http://zateguzosarumaw.epizy.com/energizer_wii_remote_charger_not_charging.pdf
    • https://uploads.strikinglycdn.com/files/269b3ffd-ce28-4aba-b4f6-f6c183a45b7c/photoshop_cs6_shortcut_keys_in_hindi.pdf
    • http://tujetonub.epizy.com/wasivaxaxufeto.pdf
    • https://uploads.strikinglycdn.com/files/3780bbfa-bf61-4173-92d8-a9e7720bca1d/how_to_make_automatic_watch_winder.pdf
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_c3726bc5f1a14f6d9a85d96221c35430.pdf?index=true
    • http://gogewarixisude.epizy.com/how_to_write_a_short_story_creative_writing.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c9.bin
33ef7c03e69e784bd39cda2594ae26ab8edd614fc87909734c342058c397a468		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C9 5484 bytes
font_01_sfnt_off0000fa57.bin
6a441a2f0f64c7c41794a86985397cf7006f95620e4802c0a546e6861ee03c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA57 11224 bytes
font_02_sfnt_off00012044.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12044 4324 bytes

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