Malicious PDF — malware analysis report

Static analysis result for SHA-256 17904460c351814d…

MALICIOUS

PDF

163.0 KB Created: 2021-04-01 11:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: bb2c0b68f4779c942474e3e00017f0f8 SHA-1: b6c55e7e71705212a2901c604863ad762c302d86 SHA-256: 17904460c351814dadb5df37e0e97a065a60d9fcb103cf5bccfeef716bae64bd
174 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document exhibits multiple indicators of malicious intent, including a high ML classifier score and ClamAV detection as a phishing trojan. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to copy and paste content into a shell, a common technique for executing downloaded payloads. The presence of numerous external URLs, many hosted on disposable domains, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/wix?keyword=network+protection+and+automation+guide+by+alstom+grid PDF link annotation
    • https://dunudafulu.weebly.com/uploads/1/3/1/0/131071166/1300597.pdfIn PDF document text
    • https://kuvuwivozud.weebly.com/uploads/1/3/6/0/136091804/092edb0d30.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/food_cost_formula_in_hotels.pdfIn PDF document text
    • https://puzelosepe.weebly.com/uploads/1/3/5/3/135317481/lixevopege_godalunala.pdfIn PDF document text
    • https://poxixarusel.weebly.com/uploads/1/3/4/1/134131789/7491873.pdfIn PDF document text
    • https://xemuputib.weebly.com/uploads/1/3/4/5/134506680/fad6d66c6dbd04.pdfIn PDF document text
    • https://viwekaxirudadax.weebly.com/uploads/1/3/4/7/134700275/f73a963b9.pdfIn PDF document text
    • http://jobediniberine.scienceontheweb.net/30910153813.pdfIn PDF document text
    • http://jirenaxapibetig.scienceontheweb.net/blessed_assurance_elevation_worship_chords.pdfIn PDF document text
    • https://gexasibe.weebly.com/uploads/1/3/5/3/135306593/440433.pdfIn PDF document text
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/tamizekumuwapu-nipanifujifi-dapuse-buloduzirazo.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/35029775045.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/bavitubujojore.pdfIn PDF document text
    • https://jobifavizatop.weebly.com/uploads/1/3/4/1/134108852/tujejujezu_lowinoboli_wogadiziped.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/a75f038f-6d17-4f21-ac1c-6a075442e919/99651004497.pdfIn PDF document text
    • http://runatavakez.epizy.com/factual_report_writing.pdfIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_d37cc75087f3465b8e043ef11d71b15a.pdf?index=trueIn PDF document text
    • https://3c2b787d-8465-4662-bdcc-bf736d584291.filesusr.com/ugd/8760e7_5fa20ba9c4414a5794088218b5e8890d.pdf?index=trueIn PDF document text
    • http://naresukewuvaz.epizy.com/zasoxarovukakomuzon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4716db67-1cfd-43d9-b696-b1b1bfa672ac/gumamake.pdfIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_09938c6acc4a4298b53d7f7da4473748.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/86fd48dc-abbf-468a-bd47-52f3f3620328/how_do_i_apply_for_free_childcare_for_2_year_old.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b7357ba-0b53-4afd-a043-c14e26cdd216/13068394420.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_off000235c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x235C0 1528 bytes
SHA-256: 1158b34ccfadb1050709ca852ad7095d09a99b7f7b76b5723b8b8bc8dcfd65f3
font_01_sfnt_off00023d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23D8B 5760 bytes
SHA-256: 2630b773a76103ab61bd360e4530b97ecc0bb77c468a1e9dd60583f4efde14ec
font_02_sfnt_off0002512f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2512F 13024 bytes
SHA-256: 730b2df971c4a96446c7ecf02fafe833bed5114d264db029ed4026feaf09411d

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