Malicious PDF — malware analysis report

Static analysis result for SHA-256 2093264ac30b1e3c…

MALICIOUS

PDF

70.1 KB Created: 2021-04-05 20:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4ff3045d4a7da118b91b31057b1f0c3f SHA-1: aca1dfef2b1507e0fa5145f88fdc02f8e63e5bdb SHA-256: 2093264ac30b1e3cb4133c342009895c016ddaf1ee29aa4ca0fa944c4adbc5d4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document is designed to host multiple links on potentially untrustworthy domains, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/award?keyword=ssrs+extra+blank+page+pdf PDF link annotation
    • https://cdn.sqhk.co/guzowozuk/dhbii02/vezovolurikip.pdfIn PDF document text
    • http://de-bewertung-889562.icu/la_valse_damelie_sheet_music_pianobagdj.pdfIn PDF document text
    • https://cdn.sqhk.co/vapiwibisa/idcU8u1/50096583031.pdfIn PDF document text
    • http://techanomic.com/voltage_regulation_and_efficiency_of_transformerjzenm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463824/normal_5fd12c6fdb26a.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/hm1BYb8/gidakevemufobuxogisi.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/xYRwxih/grand_theft_auto_6_trailer_official.pdfIn PDF document text
    • https://cdn.sqhk.co/sufokorume/jha6oBn/60898153022.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/cifRMgj/7659596834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_603e8129eaa6a.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/jajggfW/89541031432.pdfIn PDF document text
    • https://cdn.sqhk.co/lupekute/eicghjd/47195894802.pdfIn PDF document text
    • http://hydra.moscow/how_to_round_decimals_to_the_nearest_hundredth_in_excelxz0o5.pdfIn PDF document text
    • http://reduslimitalia.site/72500463697wkyph.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449779/normal_602603f35f9da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449012/normal_606154fc03df4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426410/normal_602e38ebc12f2.pdfIn PDF document text
    • http://rilizikurejoru.22web.org/vedixazovixetid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bikikifuxax.epizy.com/ethiopian_airlines_crash_report_being_released.pdfIn PDF document text
    • http://kaxoxosav.rf.gd/efectos_de_los_actos_de_comercio.pdfIn PDF document text
    • http://tewebubezu.rf.gd/honeywell_thermostat_rth2300b1038_instructions.pdfIn PDF document text
    • http://ruxazek.epizy.com/zubin_mehta_nessun_dorma_translation.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_off0000d50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50C 5584 bytes
SHA-256: b3e0c79ebf05cfccf937d10dc2fc5096dd8589de53f6452ea3e553c73a7774d2
font_01_sfnt_off0000e816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE816 10240 bytes
SHA-256: 31bd92e348b5d6834dbb329ae126fb33d36dbf696843451ef8c38aed09773285

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