Malicious PDF — malware analysis report

Static analysis result for SHA-256 785e12258979cc96…

MALICIOUS

PDF

98.0 KB Created: 2021-03-24 07:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 998f21c27b3cc50044da48f85f0e2f76 SHA-1: fa11dfc86faccba6c9fcd6fd96b1ed68fe59fb79 SHA-256: 785e12258979cc96d88bd89a9b8b55c6c9923b0d52f626bd941c3bac44995aa0
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The presence of numerous external URLs, many pointing to disposable hosting and exhibiting link farm characteristics, strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://bologen.ru/award?keyword=assemblies+of+god+church+constitution+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493610/normal_60073499a5ae3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490269/normal_604b2de9b5ef3.pdfIn PDF document text
    • http://amorexpo.com/tevivamixlmb5e.pdfIn PDF document text
    • http://chisto-chisto52.ru/nibs_college_application_form9bp5i.pdfIn PDF document text
    • http://lazadacostumercenter.com/charge_sheet_section_crpcwgdtm.pdfIn PDF document text
    • http://selectgetc.top/crosman_1077_spare_magazinellv1h.pdfIn PDF document text
    • http://lolkek.xyz/waforexi1w214.pdfIn PDF document text
    • http://stav-games.ru/wufibebemubuvemetakefuvadi1e8c.pdfIn PDF document text
    • http://lenudes.com/mtb_step_3cnba1.pdfIn PDF document text
    • https://fexiganariv.weebly.com/uploads/1/3/0/7/130739648/1981110.pdfIn PDF document text
    • http://flash-sar.online/singer_tiny_tailor_tt600_manuale_italiano2pjds.pdfIn PDF document text
    • https://zeregosuw.weebly.com/uploads/1/3/6/0/136055393/pilaximezakat-wobavixodi-fegerinegapedet-fadesewutifewu.pdfIn PDF document text
    • http://brightshopbg.xyz/pabibunaxet986ap.pdfIn PDF document text
    • https://fofodivadi.weebly.com/uploads/1/3/4/8/134895081/4564779.pdfIn PDF document text
    • http://trenolgia.buzz/7299861380xj8yv.pdfIn PDF document text
    • http://copyrightsupporteds.com/putogavafedonipilubonikgpc.pdfIn PDF document text
    • http://gouliwer.online/612405850839yaes.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
    • https://uploads.strikinglycdn.com/files/b3b2ae73-748b-40c3-98d8-2e181e6d18c1/64696542366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3cb8540-becd-4610-81a7-aed8ae4c236c/64408325873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35630114-6ff3-4720-8874-74ca2f4632a2/what_is_presentation_layer_in_osi_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d2b851-62be-4354-8440-2a67e009c806/cateye_mity_8_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428f0388-07ee-467b-adb7-b33804ded98c/stephen_hawking_film_trailer_deutsch.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_off00013289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13289 5372 bytes
SHA-256: 522c53f9056bced08560f798c9234f946e9faba61498bbb7d6715ab57fbed378
font_01_sfnt_off0001449c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1449C 11648 bytes
SHA-256: 4b9638ba93b54ad69cd5d3df8bc5a0503e81b8ab88b80f044aae39aa0d627b69
font_02_sfnt_off00016c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C49 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.