Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9443568aeeb61a…

MALICIOUS

PDF

84.4 KB Created: 2021-06-11 15:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5c174dce5e670018b74a4712d85dcdea SHA-1: 68922ef68b46cdc3014003a79d195b4a4cff2b72 SHA-256: 6b9443568aeeb61a283970e785b9b9189f17983faf8201800250fbdf504a7bf6
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary focus on directing users to 'nomylo.ru' under the guise of a torrent download. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links pointing to disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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/pbw?utm_term=twilight+all+parts+torrent PDF link annotation
    • https://gekubele.weebly.com/uploads/1/3/2/6/132683169/1108508e.pdfIn PDF document text
    • https://vovamujif.weebly.com/uploads/1/3/5/3/135318660/36734ab65e3230e.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/bilaxane.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4379032/normal_60b67fa4645fc.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4490377/normal_60b6cadd3250d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484383/normal_6021a75565da0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402014/normal_6005307927aa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_5fe6ccff7a437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412408/normal_6027953b01b11.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/4940822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_6047dee685758.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://dokajawema.pbworks.com/f/formula_para_sacar_el_volumen_de_una_prisma_hexagonal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14c9c086-7f38-4fec-b217-659ef6fef3f8/is_kirby_a_pyramid_scheme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b80e721f-0fed-4d4f-991c-84f5d8ffabda/nizataperixareroke.pdfIn PDF document text
    • http://mituxap.pbworks.com/f/how_to_reset_samsung_tab_3_8.0.pdfIn PDF document text
    • http://zuvumuname.pbworks.com/f/26448091854.pdfIn PDF document text
    • http://giwupiraride.pbworks.com/f/gta_v_iso_psp_highly_compressed.pdfIn PDF document text
    • http://fudotedafeji.pbworks.com/w/file/fetch/144909315/rusekekitize.pdfIn PDF document text
    • http://tagexoba.pbworks.com/f/free_robux_no_gift_cards__500__0.22__1.42__Medium__39.pdfIn PDF document text
    • http://kiletejude.pbworks.com/f/49214783979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ebc74cb-aadb-46af-aaeb-623c844124c5/the_importance_of_being_earnest_quotes_act_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/288b4b1d-06a4-429e-b389-a171c901f0b8/zamogiwenigumaguluwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79fee13d-9b52-4318-a5b9-1f3f1cf31a5c/arris_tm822_spectrum.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31E 3000 bytes
SHA-256: 8fb14223296257fd9ab0e373f091947723c339cb2f8101bd33ce59e411a05350
font_01_sfnt_off0000edc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 5124 bytes
SHA-256: 37ce1f34f05fea5ae0f9365fe89298dc468f37cdcee35f597fef0aa109a19be4
font_02_sfnt_off0000ff3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3B 10856 bytes
SHA-256: d6e46703fb3c7e32b75d1930cae6757d933fbf13ad5cabeea4cfba4b8b84e0eb
font_03_sfnt_off000124d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D2 16060 bytes
SHA-256: d7dbcefd5a9d087f9dbd48d87e5b82950a900fa0f666d4a1f78598b818f3f613
font_04_sfnt_off000139a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A1 2324 bytes
SHA-256: efdf4055fb6198591621d11d1c64ee63e6a865f79e9fa78ca1088a7e70156cd4