Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09c2ab3711f958f…

MALICIOUS

PDF

75.3 KB Created: 2021-03-24 21:14:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7cf6c66c40f836e39217e0b58e29f33 SHA-1: dc425833befe93026568e709770472bf37c5bc86 SHA-256: a09c2ab3711f958f7c7541976f69b1f19a4477dd55e9514a5768fa2300f65743
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be related to a 'weather report', suggesting a social engineering lure to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://nipisod.ru/123?utm_term=weather+report+glenside+pa
    • http://kolagozisil.mywebcommunity.org/what_is_complex_learning_theory.pdf
    • http://fovoxarofej.getenjoyment.net/lezapibozuwowulejawagewu.pdf
    • http://lastmarkt.ru/motogp_results_aragon_20188geky.pdf
    • http://a-trvl.ru/vw_service_schedule_tiguanxwzzr.pdf
    • http://nepatokada.mypressonline.com/42030088882.pdf
    • http://helpforteam.com/learn_php_html_cssf1pc0.pdf
    • http://vwwv-avito.online/xupokejupabanozamujunesejgyga4.pdf
    • http://prodson.space/737633634849ndee.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/aacf7696-99aa-4b24-a01f-f3b9a6890de6/what_are_the_elements_or_formula_of_discipline.pdf
    • https://s3.amazonaws.com/xixonu/what_is_wifi_speed_ac1200.pdf
    • https://s3.amazonaws.com/wozoxub/black_desert_online_sea_class_guide.pdf
    • https://s3.amazonaws.com/wupagivoz/pfeffer_leadership_bs.pdf
    • http://vuxepogi.atwebpages.com/gogilo.pdf
    • https://s3.amazonaws.com/falufusu/gebamudaruwotovi.pdf
    • https://s3.amazonaws.com/jidagafinuxesu/lixujolafizij.pdf
    • https://s3.amazonaws.com/zibenoroduzuw/3d_max_model_free_site.pdf
    • https://s3.amazonaws.com/mesixadelomomo/91529824567.pdf
    • https://s3.amazonaws.com/kuboki/44927787724.pdf
    • https://s3.amazonaws.com/dalava/83426039975.pdf
    • http://noxukimu.myartsonline.com/padabofovuz.pdf
    • https://uploads.strikinglycdn.com/files/4c2301b7-669b-4b70-89cf-607d3d20dd9c/geramurotozolagamuveb.pdf
    • https://s3.amazonaws.com/fifuto/49344559581.pdf
    • https://uploads.strikinglycdn.com/files/a413da62-ed7d-4e21-8960-24d11cf85fb5/how_much_would_a_dachshund_puppy_cost.pdf
    • https://s3.amazonaws.com/batoragubukepo/45457152504.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_off0000dd1b.bin
1d3ecb864cbcd1c92678b8b8b0b66b28f7bd2366f37ead8484810fd00231e030		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 5024 bytes
font_01_sfnt_off0000ee2d.bin
e304e7df7925ff391b00a8e8768943f16bdb9fef89da201a4028142c98453de0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2D 10328 bytes
font_02_sfnt_off00011170.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11170 4324 bytes

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