Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e28a496a508c34…

MALICIOUS

PDF

77.6 KB Created: 2021-09-09 03:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f5ee741b607bc0a7031567cbe5f998ba SHA-1: c0da9e17d9dca5e70de9add54b6d0cdc6ea05232 SHA-256: e5e28a496a508c34f2f1e43c37f294f249dbd5ee14e867f36ab6c3b272544e6b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one specifically pointing to a lure related to 'euro truck driver hack'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links to disposable hosting, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://coretry.ru/uplcv?utm_term=euro+truck+driver+hack PDF link annotation
    • https://sgotomotiv.org/upload/files/ziteralerudepijenun.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/98499024428.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/xefosexuxabavoj.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/javakugobojisavibon.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/zakixumobedejuweka.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/84935503354.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/42888555730.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613337246be15---65206025698.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/86758022828.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/36825309373.pdfIn PDF document text
    • https://o-dance.com/upload/files/75413004964.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/7082379059.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8d231e9b0---27962035611.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/pogemexofepepu.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/vipinegaletotovozoluserul.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/dikek.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/46409698499.pdfIn PDF document text
    • http://greensketch.in/userfiles/file/sikimumosof.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/dawudugabovikobekuse.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/69892612092.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/tarapuzatirosagezaf.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/55907753.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://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_off0000ce92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 10388 bytes
SHA-256: 95179f323056def4413ff94620696ceca5d16e507127139adede0caafff4f469
font_02_sfnt_off0000fe5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5A 16700 bytes
SHA-256: 1204114244eb1c9581536f91c03bd5f6cee137302b926230eb43dd5ad6a8764f

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