Malicious PDF — malware analysis report

Static analysis result for SHA-256 c456228f1f7a002d…

MALICIOUS

PDF

75.4 KB Created: 2021-03-19 11:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2a51945bc820a2aac256de8ad3920120 SHA-1: c8da8c0358e047a0dfd935458468b6a935f4567d SHA-256: c456228f1f7a002dd3ff542676eaa214c49fcd6ddd92a908c303272c48758651
126 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains text related to 'esv study bible app ipad', which is likely a lure to entice users to click on the embedded malicious URLs. The ML classifier strongly indicates maliciousness, and the PDF structure with numerous external links aligns with techniques used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://pelibifir.ru/strik?utm_term=esv+study+bible+app+ipad PDF link annotation
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/6293405.pdfIn PDF document text
    • https://cdn.sqhk.co/dakizenewa/0jdlxZj/39486119488.pdfIn PDF document text
    • https://xoxovumalojiru.weebly.com/uploads/1/3/0/8/130874224/pawipizij-kajufabasose-nazekagedilaj.pdfIn PDF document text
    • http://grenkasalo4.xyz/9955818391c7z7q.pdfIn PDF document text
    • https://cdn.sqhk.co/zudusidesu/cjaRKja/acceleration_worksheet.pdfIn PDF document text
    • https://sefariduzaki.weebly.com/uploads/1/3/4/6/134665623/pebomelevetoxalel.pdfIn PDF document text
    • https://sowekunozo.weebly.com/uploads/1/3/5/3/135321923/9d7addb817f6.pdfIn PDF document text
    • https://jodalutuz.weebly.com/uploads/1/3/4/4/134444421/xodat_tavesezul_tosajaguro.pdfIn PDF document text
    • https://wetokusoxuzufo.weebly.com/uploads/1/3/4/5/134508242/nojijajemopinipareli.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/tqibhcP/battle_command_mod_apk_unlimited_money.pdfIn PDF document text
    • http://itdiscounts.pro/sharp_1.1_cu._ft._over-the-range_convection_microwave_oven_r1881lsyge0jk.pdfIn PDF document text
    • http://fogafiv.mypressonline.com/penobojaxorekewanefowin.pdfIn PDF document text
    • https://wutejaguruloz.weebly.com/uploads/1/3/1/8/131871665/8463460.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/xghvKgd/devonaxorejabazewufupo.pdfIn PDF document text
    • https://mosugomepa.weebly.com/uploads/1/3/4/0/134096926/fagigidile.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/4571113769.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_fa2543a63473471e84acd6209baa2503.pdf?index=trueIn PDF document text
    • https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_cb24780c055946b08e2a4a994afa0b84.pdf?index=trueIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_6de4bc396a8d47a881e0df9bdcefb67b.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA01 5116 bytes
SHA-256: 93524b78ed5607f63e80437dedba9232906ee86b9e4b6946874f63b030d01a4f
font_01_sfnt_off0000fb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 10948 bytes
SHA-256: 17e34286e55df9e866c222a8b29a4759d803db2b61da0ae24b534d8a6f83fc91

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