Malicious PDF — malware analysis report

Static analysis result for SHA-256 c200f6a20b85e98f…

MALICIOUS

PDF

79.7 KB Created: 2021-03-20 14:33:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c1eb0da541ac26b5bfe9eee00c679b9 SHA-1: d78ba1d73cb659f52d373eb64bac87adc77cbcb4 SHA-256: c200f6a20b85e98f0f165824fa4c6156382066073902a9e29c5214538d61bc49
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings point to a link farm of external PDF documents, with one URL leading to a potential phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/aws?utm_term=daniel+plan+diet
    • http://gafabotipunofu.mywebcommunity.org/the_twilight_saga_new_moon_tamil_dubbed_movie_download_in_isaimini.pdf
    • https://pukiroxe.weebly.com/uploads/1/3/2/3/132303351/7606314.pdf
    • http://vixabaj.scienceontheweb.net/winston_mathematical_programming.pdf
    • https://garirebed.weebly.com/uploads/1/3/4/6/134669878/daroten-loxizabenobir.pdf
    • https://waxosutuj.weebly.com/uploads/1/3/1/4/131437699/d129a4.pdf
    • https://ramasiwo.weebly.com/uploads/1/3/5/3/135390431/24e5bab.pdf
    • http://farunoraxukiz.getenjoyment.net/mesh_topology_advantages_and_disadvantages.pdf
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/nofededolip_tefojuxipazudin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_ec0e8ca9913c49b7a9384f717cc8fbf2.pdf?index=true
    • http://pizuzol.onlinewebshop.net/52869283604.pdf
    • https://uploads.strikinglycdn.com/files/898728e2-9d58-4530-8309-6a8307753509/11348953202.pdf
    • http://fiforeru.atwebpages.com/54194663525.pdf
    • https://uploads.strikinglycdn.com/files/d9a32a2b-875a-4acd-94f9-ba943a1fefb9/nudabezipezofejuzixu.pdf
    • https://uploads.strikinglycdn.com/files/c8f59785-efe1-480d-a80c-a738fcf69aff/60590609689.pdf
    • https://0115c081-d8bc-4983-a705-81db93bf1442.filesusr.com/ugd/990402_98436146f5ce42a8b4ae40dac2868c02.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d6cadbce-41c0-4b1d-bf64-380c8bbe4ed8/foponokok.pdf
    • http://zatuvejamubolo.atwebpages.com/avatar_korra_comics_read_online.pdf
    • https://uploads.strikinglycdn.com/files/c83ee551-e524-43e6-aef4-850f116241a4/jikovokafododun.pdf
    • http://buzumigasox.myartsonline.com/pebujevawipudase.pdf
    • https://uploads.strikinglycdn.com/files/b6f1dd5b-61b4-4ad8-9e14-dc4264714db8/wufevosavefulezimafisunov.pdf
    • https://uploads.strikinglycdn.com/files/bfacb456-5c49-4162-bc5f-9a9328219e3a/culture_means_of_production.pdf
    • https://uploads.strikinglycdn.com/files/73075b6e-5e25-404b-969f-cdadc3d42c1c/verbal_advantage_download.pdf
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_edb157dfc3e14d45ab45b1370022fda9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3edcae2b-0e86-425a-b547-8f836615e01e/49581559829.pdf
    • https://uploads.strikinglycdn.com/files/24444367-5c19-4171-9e49-2775092f2102/how_to_fix_graco_simple_sway_swing.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcac.bin
02b3e794283aa24d6481a2230dd008cf9c2bcce86918f768e84575df00ef42ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAC 4680 bytes
font_01_sfnt_off00010cb0.bin
9c1740c782731d17e9ab889dfcbc5f01143b3ad29ebdd4b341efb15919b7d75b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB0 10788 bytes

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