Malicious PDF — malware analysis report

Static analysis result for SHA-256 717bd7e89e214d5e…

MALICIOUS

PDF

80.1 KB Created: 2021-09-12 18:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f73387912039072e8481d954c4d3c550 SHA-1: 6ba01b335c04f217c06a715d5f5c91ca0bedb572 SHA-256: 717bd7e89e214d5eb76880271fc7e411610014c0d8f6df6659a0fe18ae8130d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a malicious PDF used to lure victims to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://archism.ru/uplcv?utm_term=deleting+photos+from+android+phone
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/3a9006909f4802fa079b44fdc1594543/84576976515.pdf
    • https://nieruchomosciprzetargi.pl/files/file/92687400591.pdf
    • https://sanvexe.vn/webroot/img/files/lamafew.pdf
    • http://pereplanirovkaoblast.ru/pict/file/59872815130.pdf
    • http://pegastelco.com/pictures/files/54432846648.pdf
    • http://hattingtoemrerogsnedker.dk/userfiles/file/rozulozepujomivubi.pdf
    • https://foundlight.ca/home/foun6192/public_html/files/custom_files/file/31259665879.pdf
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/76527226360.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346b01c5106---93542841674.pdf
    • http://yarpb.ru/pic/userfile/22168261366.pdf
    • http://beamstraffic.ae/amb/userfiles/file/32376898889.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/f9e0p2mvbvb596pug9c4sv5jm3/zutoliwegula.pdf
    • https://stmpallet.com/ckfinder/userfiles/files/72327523888.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/992b713c1491f4c424b56ef7521e8a57/busimiwaxubawemedek.pdf
    • http://fireprovietnam.net/luutru/files/57080208540.pdf
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/divereguvajisemafutupojil.pdf
    • http://flemingdecal.com/uploads/assets/file/8755196632.pdf
    • https://dodatkireklamowe.pl/web/uploads/files/30347871562.pdf
    • http://linuxnewyork.com/draft/media/rolonal.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613def09e76c9---23161389688.pdf
    • https://gemwares.com/userfiles/file/62544328609.pdf
    • https://ismart99.net/upload/files/5087983083.pdf
    • http://aaaexpressac.com/userfiles/file/82032845914.pdf
    • http://metamorfozyayincilik.com/userfiles/file/zujebodululibenida.pdf
    • http://logistra.fr/ressource/site-image/files/15980649195.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_off0000d4fc.bin
7c08826d0df097c97cb0313c7ab9d91736bb90462face756043a7061739e196d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FC 10948 bytes
font_01_sfnt_off0000edf4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF4 16792 bytes
font_02_sfnt_off00010606.bin
0296ea951d287bc57841def5b82f904fae7b23a274f4bbdbf259a2221cbe0c59
pdf-font-stream PDF embedded font (sfnt) at offset 0x10606 17324 bytes