Malicious PDF — malware analysis report

Static analysis result for SHA-256 67067575147a609d…

MALICIOUS

PDF

80.5 KB Created: 2021-09-18 09:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 646504910d89787881fdf34ca0183b31 SHA-1: a5230e9ce0b4409f60515c7f8742d672f117dff7 SHA-256: 67067575147a609d8a831749c726d2792f60fb9329c286371d2f44b3878e8769
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to suspicious domains, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://alwaditrading.com/userfiles/files/pofaz.pdf
    • https://lacausedeslivres.com/userfiles/file/bavemuwupuda.pdf
    • https://vili-al.com/uploads/wysiwyg/files/zotuzoliju.pdf
    • http://wcsps.com.tw/ckfinder/userfiles/files/kuzeravimaziwo.pdf
    • http://gazdalkodjokosan.hu/img/userfiles/file/jokekududafekejasiduteko.pdf
    • https://noithathoaphat11.com/upload/files/kebelakaxikaxiputulow.pdf
    • http://hoangduy.vn/vn/files/togolixuluguvinisivaju.pdf
    • http://gsnursing.in/ckeditor/ckfinder/userfiles/files/tunofaz.pdf
    • https://sahyadrisevasanstha.in/userfiles/file/18193549715.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130dfa61195b---fojolaperegewaje.pdf
    • https://nieruchomosciturystyczne.eu/files/file/sasafazokuzuzusetesujebix.pdf
    • https://produktybhp.pl/pliki_user/File/37969480292.pdf
    • http://www.gulbaharsigorta.com/contentData/file/14638355965.pdf
    • http://tizianaiberti.it/userfiles/files/tetaxugipubabor.pdf
    • https://hinodecoder.com/userfiles/file/78753024489.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613efd76efcd7---nadoduroluxurukevimojuw.pdf
    • https://damiel.eu/userfiles/file/60655290031.pdf
    • https://heart-calligraphy.com/uploads/files/202109020100294745.pdf
    • http://pzhjintai.com/upload/files/kozit.pdf
    • http://piqiso.ru/userfiles/file/sesazegi.pdf
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/57161458513.pdf
    • https://asiastudy.in/ckfinder/userfiles/files/32972385499.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=c%2B%2B+notes+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d39b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD39B 16792 bytes
font_01_sfnt_off0000ebad.bin
e8066198eac9625305497db03775f7941dcb49740e576cf01f814a25f4395c6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 19704 bytes
font_02_sfnt_off00011e64.bin
cb94ab48d90887e8e1bb028358245f3315023e434f1bcc9daeee4b7adfe1edbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E64 10120 bytes

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