Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0f04b0ea884d74…

MALICIOUS

PDF

74.7 KB Created: 2021-09-18 10:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 883b70d2e4db1b972814b47a3f0d6ed0 SHA-1: dbcf8ffb5619349a1a6bd194e702d1fac098a298 SHA-256: ff0f04b0ea884d74fbff00f9505ef23e30ef8ebdeed7c39060d61d4182b47d1b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic analysis revealed it functions as a link farm, directing users to numerous disposable domains, one of which is `https://nomylo.ru/uplcv?utm_term=download+shareit+mod`. This suggests the document's primary purpose is to facilitate the download of potentially unwanted or malicious software through a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://nomylo.ru/uplcv?utm_term=download+shareit+mod PDF link annotation
    • http://munnartourism.com/uploads/file/64179932779.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/24889583123.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/15405493456140022fca78e.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-9-5/20210905002701670853.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/begalakibotizosovikavawef.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/c7325bf0c16858b334bd45f7ba576358/sewanonopuzivisoraxomaven.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/34813917512.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/14554138993.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/48481996459.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gowapuxezofalut.pdfIn PDF document text
    • http://master-vin.ru/files/file/pijiziles.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/kenexojakirudu.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/jamofewelewetorirafumexa.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/bavuvi.pdfIn PDF document text
    • http://iccarrentals.com/files/file/dukibarusukolekezaweja.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/muponujovigigeloke.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/37256970242.pdfIn PDF document text
    • http://lobi.md/userfiles/file/42811822364.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/ninadunafazalomis.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/66275926081.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/2584388286.pdfIn PDF document text
    • http://youngdongtec.com/userfiles/file/71606292148.pdfIn PDF document text
    • https://eco-translation.ca/upload/editor/file/14293229371.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613647c04e48e---bizaboveto.pdfIn PDF document text
    • http://law885995.com/upload/fckimages/file/43707641372.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C4 10600 bytes
SHA-256: 08dce73abb32c9903348b67cb7c6deb8fc67337ab655a37728566ae581811353
font_01_sfnt_off0000dbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E4 16124 bytes
SHA-256: 919703e91a354874ed025f14f2a298b48fd1382c1feedf0ec5e9e30904736e70

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