Malicious PDF — malware analysis report

Static analysis result for SHA-256 685f15493e190ad0…

MALICIOUS

PDF

82.4 KB Created: 2021-03-18 02:28:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04f39ecc8c3ad7ef2a1a43a61499fa88 SHA-1: 5915708a15fa8f6b296e414cc2aede97f92b769d SHA-256: 685f15493e190ad07d2730030c2f86f7a7fd6aa04a63138c885bf118e913872a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'zajinet.ru', which is suspicious and likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

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/wix?keyword=shaolin+workout+pdf
    • https://jokasagumejede.weebly.com/uploads/1/3/1/0/131070006/kixopu.pdf
    • https://tusosalowikos.weebly.com/uploads/1/3/1/4/131453146/4176412.pdf
    • http://suzofovolavuk.scienceontheweb.net/nawapomuzopikubovov.pdf
    • https://cdn-cms.f-static.net/uploads/4450353/normal_60222bb975a3d.pdf
    • https://cdn-cms.f-static.net/uploads/4416654/normal_60367c7e85d51.pdf
    • https://wabexerimib.weebly.com/uploads/1/3/0/7/130739061/9739504.pdf
    • https://cdn-cms.f-static.net/uploads/4467300/normal_605282314a45b.pdf
    • http://dalidusiz.mywebcommunity.org/a_court_of_mist_and_fury_age_rating.pdf
    • https://static.s123-cdn-static.com/uploads/4477886/normal_5ff0f34baed87.pdf
    • http://tagukefinifofe.iblogger.org/48021722281.pdf
    • http://xukosususif.medianewsonline.com/citizen_eco_drive_wr100_battery_replacement.pdf
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/boxakejob-nepikogipinuben-feginel.pdf
    • http://kuguduma.iblogger.org/stanadyne_fuel_injection_pump_manual.pdf
    • http://wedasuf.getenjoyment.net/diagnosis_of_parasitic_diseases.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://namopidud.epizy.com/xiselobofopegugutufifefab.pdf
    • http://sipanokule.onlinewebshop.net/a_song_of_ice_and_fire_reddit.pdf
    • https://s3.amazonaws.com/vinejivunitego/personajes_principales_y_secundarios_el_amor_en_los_tiempos_del_colera.pdf
    • http://botixegaminolol.rf.gd/glue_epdm_sheet.pdf
    • https://s3.amazonaws.com/vovabagubajegeb/jukebox_song_list_template.pdf
    • https://s3.amazonaws.com/folexapurilowe/likurebexuvinosa.pdf
    • http://mekigutesazi.epizy.com/arduino_starter_kit_manuale_italiano.pdf
    • https://s3.amazonaws.com/rojalexipokadaz/entrepreneurship_theory_and_practice.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_off0000f7e6.bin
03f760cebc44ddb69f8da068da6042fe8a9be1174efecc759ad4cb7c4d7e8183		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E6 4972 bytes
font_01_sfnt_off000108bf.bin
68cec98a7bb9fbe41c00879d3cb70212072c244e978606d7bf35bb4b1625a444		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108BF 10540 bytes
font_02_sfnt_off00012cd6.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD6 4324 bytes

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