Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56a253c6120dcff…

MALICIOUS

PDF

92.3 KB Created: 2021-06-06 13:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 17d395b1b034531a95c805784391c078 SHA-1: 7d79f6a5a6cee2add9429ec0261f2d963571ab5c SHA-256: c56a253c6120dcff337c8cbd89da20a9d0addbee4e846689b6371dd4c5a82222
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://wastran.ru/pbw?utm_term=how+to+write+3+hundredths+as+a+decimal PDF link annotation
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/zezawizazovodogoz.pdfIn PDF document text
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/7032123.pdfIn PDF document text
    • https://gosedizomomusuw.weebly.com/uploads/1/3/4/3/134313056/1a37efe73.pdfIn PDF document text
    • https://xuzopodoker.weebly.com/uploads/1/3/0/7/130738955/xovejakuwebosununur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/927e2ad4-7dfc-4b3b-b4fd-5a523262cd1d/71246601105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b273aef4-0fd9-400a-9d0f-0395d767dd88/blue_yeti_nano_premium_usb_mic_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61239ab1-92c2-407f-9f90-c92ecfc1455a/h_r_giger_necronomicon_ii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5799e812-0a45-42b2-a5af-a5fe61c32666/mi_planta_de_naranja_lima_pelicula_audio_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10a337f-b1a6-4049-81df-1ec917320550/graco_click_connect_35_car_seat_weight_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56cbbf85-0fb1-4a17-8360-df923a6b7b14/kerbal_space_program_mods_installieren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a35070c6-e4e2-41cf-89eb-fd890bf8f542/vexitesodowesigazizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20ee496-b9c2-43f9-a100-e8e51eef3eca/i_love_it_when_you_call_me_senorita_clean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adf1018e-b880-496d-b251-d52adf973752/pevegarolejetiberojapamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d8bfce6-9bad-4b50-bbd4-23ad67b9a9b3/how_to_reset_powerbeats_3_headphones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa48c00-ad10-437f-b5f5-899fa84d236e/united_states_military_emblems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e20cedd-921b-43e5-912e-46ed90a3478a/anlisis_del_poema_espero_curarme_de_ti_jaime_sabines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb395269-968e-4574-9ff9-eb723cdcdf9c/pogimudibawonow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39bb7bec-33a3-49fb-9f62-a5a681a23815/what_is_a_chauffeur_license_in_louisiana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab41736d-ea2b-407b-a93a-c6b297b703a0/fimaruvowavodogoned.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df3513dd-534b-4915-bb40-fc9decb15614/vuzogimipujuwukipojab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48db0edf-1f22-45c7-9886-4839d10b9133/32028765724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4118ec1-4ac0-4fda-86c1-db10ced731b9/subowe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12963 5396 bytes
SHA-256: 1177d33b9ba4c6f5e5720123dcbe57f1ca4e8f765b0f0eaba20612d2d28c7404
font_01_sfnt_off00013b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B9A 11848 bytes
SHA-256: b8cd70158ef76b8ff853fbc2f4b92c634b8df6937cfe0d61e332d37d6c566842