Malicious PDF — malware analysis report

Static analysis result for SHA-256 2acc6215920a5c82…

MALICIOUS

PDF

69.7 KB Created: 2021-09-29 08:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 491dad7a2fe60c8a8b0ed8b8dbd3f4f5 SHA-1: 67da9fe9e90171c63a3833bf06601de843b258a0 SHA-256: 2acc6215920a5c821626755c3a9c7e24fe2367515daf95ed2d2acbf40864a2ab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external PDF files, suggesting a link farm or redirection mechanism. The PDF's structure and the presence of external links are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ceccarbotosani.ro/userfiles/file/mugewot.pdf In PDF document text
    • http://volareinmongolfiera.it/userfiles/files/kexisikewatuzijag.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/77457026054.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/94375854979.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/miveda.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/dilibodirupoju.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f2f56cd88e---21914754768.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/xijawaxewizuxa.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/23524595103.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/2331977400.pdfIn PDF document text
    • http://gmtshipping.com/attachment/file/91898701064.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/subugimowetodefoviwimizu.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/56960889131.pdfIn PDF document text
    • https://ms1oke.com/contents/files/36404830540.pdfIn PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/vudobikunonetijolirituf.pdfIn PDF document text
    • https://aksusu.com/upload/files/89344752437.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/jimijedekosakerigisemoxa.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/fd09f4082f715df33403341ca172716e/54201699108.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/pigiweze.pdfIn PDF document text
    • https://dootion.com/data/attachment/file/vilatezizolunonelopanix.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/fizukefurotekisikiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=god+of+war+chains+of+olympus+psp+cheatsPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE05 16004 bytes
SHA-256: a4a435f8fbd3afd55bc1af8207c928d66420425dc1ef39efbde54b35e266fd00
font_01_sfnt_off0000d732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 11224 bytes
SHA-256: d41c239e0d7d1c3bb7ccb73aff5402355be6827aa6e0c6f5edc7650095f18616
font_02_sfnt_off0000f16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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