Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22fa9de0c301c49…

MALICIOUS

PDF

77.5 KB Created: 2021-03-21 09:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cb70a5d882ad0f5b69e9f3e697b23bc2 SHA-1: 3bb5afe450ed533ed97fc952e3f194cf186c7849 SHA-256: b22fa9de0c301c4909136c414b1b3fe0bd0c0b3458d3e6699237c47839d9a3a0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('gimoguvi.ru') and another to a PDF file on a disposable domain ('detonic-buy.website'), suggesting it functions as a lure for phishing or malware delivery. The document body, though heavily obfuscated, appears to be a deceptive lure related to an industry report.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/123?utm_term=digital+asset+management+industry+report PDF link annotation
    • http://detonic-buy.website/fovoxupezezijiuqkp2.pdfIn PDF document text
    • http://lakegefufen.scienceontheweb.net/carnatic_music_senior_book.pdfIn PDF document text
    • http://xrootunited.com/xekupagufakujigzzn.pdfIn PDF document text
    • http://spindlndou.space/89844890042wo2ad.pdfIn PDF document text
    • http://gonzo-3d.com/how_do_i_download_brushes_for_procreate_pocket2renk.pdfIn PDF document text
    • http://servempieza.site/mozuregilibabipegesibedilqf.pdfIn PDF document text
    • http://deemonatrafik.xyz/buzerixijevunixemefawilqnkc.pdfIn PDF document text
    • http://zilakagu.22web.org/avengers_endgame_full_script.pdfIn PDF document text
    • http://goproonly.com/the_empowered_empathk5pmu.pdfIn PDF document text
    • http://arevakar-travel.com/phraks_greyskull_lp_reviewq28ar.pdfIn PDF document text
    • http://puwedubunojevak.22web.org/devichi_aarti.pdfIn PDF document text
    • http://nobukuxokosiga.mypressonline.com/accounting_information_system_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450257/normal_604930b582376.pdfIn PDF document text
    • http://newberginvestmentproperty.com/29769775008abect.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388165/normal_600367c690df2.pdfIn PDF document text
    • http://limaxinsto.xyz/smith_and_wesson_915_grips_for_salez6kow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415544/normal_604cd6de2cc72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_60219ad408eea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_601ced1ea5f6e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zutugidod.onlinewebshop.net/what_is_the_sexiest_language.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/bewin.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/27693947827.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/67441724362.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/hubspot_sales_software_certification_exam_answers_2019.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_off0000f2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C4 5380 bytes
SHA-256: b5b0afad70b7116bc667ce7fae8b3990c799a022181d869a2852bb2f1363f40d
font_01_sfnt_off00010505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10505 10504 bytes
SHA-256: d2c4520740748b6fa443143b71076a5c5f384ed6ff6773c8395f4ff479f80516

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