Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ac47ba838c8b48…

MALICIOUS

PDF

78.8 KB Created: 2021-03-08 17:50:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 586e551ee5043c7d0c1a10baedbea0d5 SHA-1: 45e140f65d7312c36b6834160a49b79f7e1c40e8 SHA-256: e0ac47ba838c8b489e9297e392649729a1b4ea9d240d268cf216c9ce0d9f4994
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. One prominent malicious URL, 'https://jumiwimov.ru/strik?utm_term=nimh+won%2527t+charge', is present, and the ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily corrupted, contains text related to 'Nimh won't charge', which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=nimh+won%2527t+charge PDF link annotation
    • http://fanisore.sportsontheweb.net/who_was_the_first_person_to_view_the_walls_of_the_cellar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_0b3131a3ca9b4210bb735e0fd3f292db.pdf?index=trueIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_e47469a126f147628e1cb8260a76a2b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f100016f-1b98-47c0-8205-85211841f994/samsung_gt-p3113_battery_replacement.pdfIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_b841b1244d5b42f7a78c0e07a27018d4.pdf?index=trueIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_f49bb63a8705445abb6a5dcf7913248e.pdf?index=trueIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_bde5dff5792745969ae05bd3da9fd823.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f493fc39-bc21-4423-b3df-2a48aea74558/xepajorek.pdfIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_696146d9f5064728b4e714225e632f33.pdf?index=trueIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_25c629e97d884119ad3bec261316b994.pdf?index=trueIn PDF document text
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_5ec8ca2f1ac446fbbb7d7f8f180bada0.pdf?index=trueIn PDF document text
    • https://0108a07e-94d6-443d-bfa7-575dd38852ad.filesusr.com/ugd/756a01_477566bd0b90400f970fd41bd9c43aea.pdf?index=trueIn PDF document text
    • https://bbf05351-1c49-455c-8ea8-df349977a4d5.filesusr.com/ugd/15c6d6_9e5c05b02e304b4a8e22ce2dec2aa525.pdf?index=trueIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_5f6039f6954b45c9b8b5317c45d816e3.pdf?index=trueIn PDF document text
    • http://zaleponijodo.epizy.com/48106376437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b404df5-e809-4498-a9aa-a1459deab4a7/pujovawarazegejijizifi.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/finite_element_analysis_for_civil_engineering.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7cf9e1-2fb2-4a9d-943d-76ccfe5428b4/the_river_radio_station_front_royal_va.pdfIn PDF document text
    • http://zarusorujot.epizy.com/duwatuvopevifadaneminudu.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_off0000f856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF856 5100 bytes
SHA-256: 47944627045bd2158db2a18792f9963193dc226b4809334158ed57a1528b2d6e
font_01_sfnt_off000109a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A2 10740 bytes
SHA-256: 038c13ac4bbc6d6b5876e869d3b10273e56c955f7cc583e32cd83e40850abdbc