Malicious PDF — malware analysis report

Static analysis result for SHA-256 245aaeb963f74daf…

MALICIOUS

PDF

1.01 MB Created: 2021-04-20 12:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9e5a70a135f2163e7b0faf32960ced83 SHA-1: aafca52d1a3fc593b1cc2b0591af44facf78be7e SHA-256: 245aaeb963f74daf16309499a8edb0e0e9e7291ab8eac43cc18425421ccaae05
66 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a signature indicating it is a phishing trojan. It contains an embedded URI pointing to 'https://kuzutuzo.ru/strik?utm_term=woodchuck+chipper+manual', which is likely a phishing lure. The document body is heavily obfuscated, but the presence of the external URI and the ClamAV detection strongly suggest a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3751

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://kuzutuzo.ru/strik?utm_term=woodchuck+chipper+manual PDF link annotation
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/gixiduvarapor.pdfIn PDF document text
    • https://nuramovu.weebly.com/uploads/1/3/4/3/134363108/6110422.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/53616517830.pdfIn PDF document text
    • http://juzawuz.iblogger.org/mystic_messenger_ray_cg_guide.pdfIn PDF document text
    • http://sibidadaduzej.iblogger.org/78553352611.pdfIn PDF document text
    • https://joxeluduxena.weebly.com/uploads/1/3/4/7/134772203/f8c62576c8b9c1.pdfIn PDF document text
    • http://gegebafebofad.scienceontheweb.net/wugakubanajubezeniperu.pdfIn PDF document text
    • https://monijakuxit.weebly.com/uploads/1/3/4/3/134362478/ledafere-gafuwafaxexufig-fukavozuvesuvit-tezofisiduvez.pdfIn PDF document text
    • http://geloritiveda.mygamesonline.org/descargar_biblia_de_estudio_pentecostal.pdfIn PDF document text
    • https://pixizibonemitu.weebly.com/uploads/1/3/1/3/131382366/netolulen_tazedubezar_nuvoxib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/tone_it_up_cinnamon_roll_protein_powder_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a43ddb83-6cd6-4d97-a8f7-bb7fc6a9afe7/washington_state_covid_vaccine_appointments.pdfIn PDF document text
    • http://nojisibi.rf.gd/66371366949.pdfIn PDF document text
    • http://sapofikij.epizy.com/48808815176.pdfIn PDF document text
    • http://zupotid.epizy.com/noxupazipuxobutelopivuta.pdfIn PDF document text
    • http://xafofeb.epizy.com/factores_de_riesgo_biologico.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/nijugugudefefus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98bdf5c9-3728-4af8-90a9-99eb94e0fcad/limujojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d518849f-dd08-4cbd-950c-390278c3b923/forix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fef7259-c57a-46c1-909b-4a179ef7b5d0/is_it_worth_replacing_a_refrigerator_compressor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd726bd8-a89d-4a04-aef9-20c727e39931/cuisinart_-_coffee_center_12-cup_coffee_maker_with_water_filtration_-_black_stainless.pdfIn PDF document text
    • http://faloboxodutak.epizy.com/32083292308.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/fastest_android_emulator_for_pc_reddit.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000fbf21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF21 8496 bytes
SHA-256: 89bdc6240ea70bd29e0d0ca586ace7ac9d29eda4bc8781e720ae80846c295b4f
font_01_sfnt_off000fdae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAE7 5212 bytes
SHA-256: 39c395c5dd0ec307f5206f44cec3eba4e2a46acf08baef1081a3e0b14ecf1fe5
font_02_sfnt_off000fec87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC87 18768 bytes
SHA-256: 1977e01bf2a5c218aa749593a2fa51b790679225d066212d00f032bca17d0ef4

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