Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9618a8499b8687…

MALICIOUS

PDF

75.1 KB Created: 2021-04-02 09:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8e24a21b396732da30481b4d3673aafa SHA-1: 8197be97303afb42affd53cd48647a5e206c680e SHA-256: eb9618a8499b86877865c285592bd1274be3a8539ae6a4070a34cdfc4417a820
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and the link farm heuristic strongly suggest the document's primary purpose is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://gimoguvi.ru/award?keyword=sandvik+turning+catalogue+pdf PDF link annotation
    • http://qwonder.space/naxirirazidatarodevus19u9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449399/normal_602cd8124ff2b.pdfIn PDF document text
    • https://dopitusorotid.weebly.com/uploads/1/3/0/7/130738794/sowax_tezinoxunufi_jilepi.pdfIn PDF document text
    • https://ginimowawogob.weebly.com/uploads/1/3/4/7/134753870/verababalali.pdfIn PDF document text
    • https://cdn.sqhk.co/bezidexa/gOMVHwU/bmw_x5m_2019_performance.pdfIn PDF document text
    • http://safetymirrors.xyz/farugafopasjazgh.pdfIn PDF document text
    • https://cdn.sqhk.co/torazanopuni/ibiiC2L/garden_warfare_ps4_offline.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_601190dd7648d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470687/normal_60002302322b1.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/board_size_and_firm_performance_literature_review.pdfIn PDF document text
    • https://bunonosuvon.weebly.com/uploads/1/3/5/9/135976801/kiratuzaf_fowekuxezamadip.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwokosokif/2jbjehh/calendar_september_2020_template.pdfIn PDF document text
    • http://idealslim-ordina.site/tukaxexefaxidiwoba3xwhp.pdfIn PDF document text
    • http://italia-doc.fun/football_manager_handheld_2013_pspovnus.pdfIn PDF document text
    • https://nawiwunusuwo.weebly.com/uploads/1/3/2/7/132741181/5120587.pdfIn PDF document text
    • http://omoikiri.info/echo_pb_250_owners_manual8xhte.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mewexudidis.epizy.com/wuvejumovena.pdfIn PDF document text
    • http://vudebedof.rf.gd/javed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58260a0d-2392-4a06-9f2f-6d578514fcd9/bigesibufinijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2a8cfb-b8a4-4077-9ae3-2dc89859f051/fikedikajiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5a6188-943d-49af-8c24-015045369f41/how_do_i_become_esl_certified.pdfIn PDF document text
    • http://vuzosade.epizy.com/lomobugumimiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac1e890d-86a7-4550-bbe1-e4e32750b7e8/azar_fundamentals_of_english_grammar.pdfIn PDF document text
    • http://magomodatibotu.epizy.com/39557898177.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40D 5252 bytes
SHA-256: c45f96abd889c3f8efdb6a2665582e659dff929c18da0c78129a6f959f2864c5
font_01_sfnt_off0000e5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F7 12760 bytes
SHA-256: 930bfb398c6a18b349faa589236a9ab1c6c50e425d198d54037b06f3e25ab141
font_02_sfnt_off00010f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F40 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3