Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c92440d50dfb393…

MALICIOUS

PDF

169.2 KB Created: 2021-04-01 04:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4d1d633baa711b84068bd4adc9cdf7e SHA-1: 983dcb4bcce4ce3ac5dfc0af9aa16150a794e695 SHA-256: 0c92440d50dfb393d4ba2a30cb1e14fcf4109dd6f9acb078f208dda8a29ac6c0
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, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains text suggesting it is a dictionary PDF, which is a common lure. The embedded URLs likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://leonvi.ru/award?keyword=oxford+english+amharic+dictionary+pdf
    • http://rinujajija.getenjoyment.net/bios_beep_codes.pdf
    • https://jolevodib.weebly.com/uploads/1/3/1/6/131636654/gojiwiwujedilik.pdf
    • http://jijuduli.mywebcommunity.org/dungeons_and_dragons_manual_online.pdf
    • http://dapajurop.mygamesonline.org/google_books_to_converter_online_free.pdf
    • http://kurametugugu.mygamesonline.org/chasquis_definicion.pdf
    • https://gamowova.weebly.com/uploads/1/3/4/8/134881319/tenedikajebolaj_tadozi.pdf
    • https://cdn.sqhk.co/kiribikiv/iigeHyS/grand_theft_auto_vice_city_soundtrack_download.pdf
    • https://riveveketudoj.weebly.com/uploads/1/3/4/7/134706505/e5da8d71711.pdf
    • http://mazoxobiziwikut.iblogger.org/robajomelakugesopidivogak.pdf
    • https://cdn.sqhk.co/sisagoku/qkibHTF/wood_carving_workshop_melbourne.pdf
    • http://zulesaxeririv.sportsontheweb.net/bible_in_tamil_format.pdf
    • https://zelowomuguzak.weebly.com/uploads/1/3/1/3/131379017/pasenin.pdf
    • https://motoburibekisi.weebly.com/uploads/1/3/4/6/134623685/ed9d657e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_131fc42914a342f8a9c1ab1df3be6b66.pdf?index=true
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_351fc21f372841dcab6d895c2dea49eb.pdf?index=true
    • https://dd3a609d-fcd9-461e-ae06-f7e9ec6f332d.filesusr.com/ugd/811c3f_f4eb632840df43af915b4e1186cbfee3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bca9f5ac-3ec5-4eaf-b834-e43249811c7c/how_to_clean_a_griddle_stove_top.pdf
    • http://dujupopo.epizy.com/yoga_poses_for_weight_loss_belly.pdf
    • https://uploads.strikinglycdn.com/files/74242435-393b-48f9-8fb2-d20311c58db2/faruparu.pdf
    • http://vapedefomagejev.epizy.com/apisonadora_manual_segunda_mano.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002146b.bin
531312c59eaf59a7b8eec625e7c1eb1f1ffc54aef55750cf8fe63f8a6bb04c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2146B 13848 bytes
font_01_sfnt_off00023967.bin
97415836443ec6dd1913347a61cdd03d4502394f7f1326278af8e6da3dacb5f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23967 5764 bytes
font_02_sfnt_off00024ce7.bin
e01d25871a51e63e204f13cdc152281ab90377c30e5fde7ec826ef68cca16f72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24CE7 5940 bytes
font_03_sfnt_off0002631c.bin
feccf2921377e679b71302cf998062c2aad402a036629a77b9fbc4cb9a67a9b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2631C 14956 bytes

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