Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3536885e44411e…

MALICIOUS

PDF

85.5 KB Created: 2021-06-15 09:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e0ba7910e8fbe728751bd111b1d6059d SHA-1: 93e472ca9506584da4a9a99db1dad989ac46aba9 SHA-256: bc3536885e44411ec58b21492a3e7ab170b0c0f344d0dc271a8f892952285521
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host or redirect to malicious content. The document body, though heavily obfuscated, suggests a technical or formulaic lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/pbw?utm_term=ph+of+acidic+buffer+formula PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446647/normal_5fe0f52767b84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418583/normal_60416a4770cc0.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4420240/normal_60b360bc916dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_6044bc205c922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_600c3756c29ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fisagibop.pbworks.com/f/76315279002.pdfIn PDF document text
    • http://lokiboz.pbworks.com/f/6378386666.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/w/file/fetch/145311747/32677917947.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/w/file/fetch/144521445/62496337103.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/w/file/fetch/144606222/kipasodivenokaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddb3675e-cd10-4575-8c93-9683683d826a/the_hound_of_the_baskervilles_1959_filming_locations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66cbf759-d0a0-4802-8e47-cd528d1ac98f/86664859639.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/licencias_nod32_antivirus_gratis_2020.pdfIn PDF document text
    • http://pibadaro.pbworks.com/f/sotanimumimunegorupet.pdfIn PDF document text
    • http://risuxujuvu.pbworks.com/f/whirlpool_refrigerator_repair_manuals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa0a706-136f-473c-b0d1-8f366d9ccf49/24580700958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de270adb-0e6a-4b52-a68c-445f722aa062/are_dunkin_donuts_bagels_healthy.pdfIn PDF document text
    • http://funinupun.pbworks.com/w/file/fetch/145251126/krishna_das_medicine_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6118468-0845-4796-bfb0-8f20ab29b153/fichas_de_las_horas_del_reloj_para_imprimir.pdfIn PDF document text
    • http://wedezim.pbworks.com/w/file/fetch/145311516/adult_retro_games.pdfIn PDF document text
    • http://nudenuxote.pbworks.com/w/file/fetch/145187562/pm_awas_yojana_rural_online_apply_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40693612-3eb5-41f7-8f6a-b8483646adad/tubal_ligation_side_effects_weight_gain.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_off00010446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10446 4920 bytes
SHA-256: 03b6e0dbab5cb9c855d9f3fb00b6cb758e3772dc23d26d5cb237fd3c07b7f3db
font_01_sfnt_off000114f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F7 11048 bytes
SHA-256: b474a0ec862bf11e4f7d8a79f9cae4bc42588b10210d9e96b3d5dd40dc11d5c9
font_02_sfnt_off00013a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A51 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2