Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c77a40688381109…

MALICIOUS

PDF

79.7 KB Created: 2021-03-13 20:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2399484b735a4768e9af6f305f244d7 SHA-1: 5f96127dfb6a6fe9d06250f9b7fda7c15b24717c SHA-256: 8c77a406883811098a1c3c11dcb3fafcd0304d0d0156543c83e265fa42e8d634
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, and the document body, though heavily obfuscated, suggests a lure related to fixing a faucet. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://botokaw.ru/strik?utm_term=how+to+fix+water+leaking+from+faucet+handle
    • http://towufato.mywebcommunity.org/xogefafosari.pdf
    • https://cdn-cms.f-static.net/uploads/4497638/normal_5feaf66235fb6.pdf
    • https://cdn-cms.f-static.net/uploads/4371806/normal_603c5046eceab.pdf
    • https://cdn-cms.f-static.net/uploads/4449788/normal_60421e4f66a85.pdf
    • https://cdn.sqhk.co/zolilogifuxe/IgeIDH1/wazugorezuxa.pdf
    • https://cdn.sqhk.co/bijowiroma/de9hi8B/fuweduxupobuwevafob.pdf
    • https://cdn.sqhk.co/jedetanepiz/dEhjo5z/kisuv.pdf
    • http://pugisapi.mypressonline.com/foucault_biopolitics_quotes.pdf
    • https://cdn.sqhk.co/muxigatatini/gjjom5P/pobrecito_bebe_translation.pdf
    • https://cdn-cms.f-static.net/uploads/4448991/normal_602237359f72d.pdf
    • http://kofojoxake.mygamesonline.org/lawurebabotilejadujivela.pdf
    • http://gidilakapajuke.mywebcommunity.org/el_coronel_no_tiene_le_escriba_resumen.pdf
    • https://cdn.sqhk.co/nikajovefer/hhdjhgc/emergency_room_cost_estimator.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dazutun/area_of_circle_proof.pdf
    • http://telifujovemevo.atwebpages.com/dekukaneso.pdf
    • https://s3.amazonaws.com/pisedij/xugenufarolowixijudadome.pdf
    • https://s3.amazonaws.com/zozofufulolig/the_treaty_of_guadalupe_hidalgo_of_1848_brainly.pdf
    • https://s3.amazonaws.com/bubisifapagefe/arithmetic_sequence_worksheet_with_answers.pdf
    • http://masusoxowep.onlinewebshop.net/7812_voltage_regulator.pdf
    • http://wugujub.onlinewebshop.net/71974021594.pdf
    • https://s3.amazonaws.com/nazekisigiduz/melogozikoxodazom.pdf
    • http://kimawawasero.onlinewebshop.net/rawuvebopudegetevowu.pdf
    • https://s3.amazonaws.com/xuvamuba/how_to_break_a_curse_biblical.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_off0000f973.bin
d07c37895521529e07c2e049d8916d9b96cee284a6e3f71880b4bcf0752dd69f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF973 5444 bytes
font_01_sfnt_off00010bdc.bin
f0a3bfbe57bbd080dd609f18eb18d1b4f5eaa7b9192d6b6be7266c2638b0bdb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDC 10892 bytes