Malicious PDF — malware analysis report

Static analysis result for SHA-256 0babdfd6356237c0…

MALICIOUS

PDF

78.8 KB Created: 2021-03-19 07:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9814e6ed9efeac4475e4c3345a9212f9 SHA-1: 78b428411d446e5870889a848dce9045e1811bf8 SHA-256: 0babdfd6356237c0807a848ece23ada3abdcae6b8c0e01e5a3dfcae170dfbb14
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=air+force+one+shadow+pastel+multi PDF link annotation
    • http://hookup153.space/the_revenant_movie_scriptjakyx.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/what_are_the_cube_numbers_from_1_to_1000.pdfIn PDF document text
    • http://vandify.com/mr_coffee_bvmc_knx23_user_manual9g8nt.pdfIn PDF document text
    • http://natfreshik.fun/26309479195xbeiq.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/36301400235.pdfIn PDF document text
    • http://setlyb.online/34566237885yomdr.pdfIn PDF document text
    • http://tranquils.space/musaselimp7j6h.pdfIn PDF document text
    • http://doweryklkq.space/90424461228m1cr1.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/kozifiveduxikapojusofi.pdfIn PDF document text
    • http://snatural.space/kubuwulisuseravolikew17rwv.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/tascam_dp-03sd_8-channel_portastudio_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wutogugej/mla_bibliography_format_book_with_multiple_authors.pdfIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_c0a7376779be412d9c3d7aca1fba20d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tumasun/19057390040.pdfIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_6152a566b69747bbb01d5b88646d59d4.pdf?index=trueIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_416e0020f1164634a714717d7ab4ba1b.pdf?index=trueIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_efc4bba9e4904635a7e857c6fa40f41f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/marine_biogeography.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/zetosesipasafumadilokoji.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_off0000f727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF727 5476 bytes
SHA-256: 5484dc83f226f3acf9106cc694c8e84f8ee3fa3eac93b34c0b8f74fc1404de71
font_01_sfnt_off000109b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B4 10696 bytes
SHA-256: 0352da60d652c100f3e81521b1f39bdca6a5178543cd6c7bd3e566a472a181d7

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