Malicious PDF — malware analysis report

Static analysis result for SHA-256 672021f28e45c167…

MALICIOUS

PDF

83.0 KB Created: 2021-07-19 21:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de7955a5d5e25e178cfdb22ecbb03fb3 SHA-1: aa00bb57f7ef30c4a33c31a11a835402edf33b9d SHA-256: 672021f28e45c167faaff1f428085d7cf66f3b6fca431b5e80afa5e32ce4213a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous URLs hosted on potentially compromised or disposable domains indicates a coordinated effort to redirect victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c333ee10e3e---pelujexeres.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16081bd065cb34---tiwanefeleso.pdf
    • http://saharun.org/uploads/ckfinder/userfiles/files/96417219182.pdf
    • https://distriparkbotlek.nl/userfiles/files/kuporufaxafujodawunal.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/s03btmig7i966l4thtqjb3gkn2/kagefuwaku.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cba3ced0036---loxubuxazedopokux.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/a751cb87b6f4d2ad4b528c9515528e70/53925956175.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/2cfepq489moc9ipd841uuo1lh2/sesozisasesopividukede.pdf
    • http://mastersequipments.com/ckfinder/userfiles/files/8150725308.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160951edb08be8---49448136518.pdf
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vevuwozalobilinipikifukib.pdf
    • https://rpdev.org/ckfinder/userfiles/files/56734605776.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b350709085b---pezalaxemeb.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a22a3c7403---44959276861.pdf
    • http://jjmcp.jp/userfiles/Image/file/kanopatebo.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4dbda2de9---refivemivavejowalog.pdf
    • https://noventa.cz/media/files/file/16006273270.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/a9482b540af599c8e6cb4300fb82ccc9/15947396907.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16094d60983bed---juvizawipadi.pdf
    • http://hurtmar.pl/Upload/file/42416277299.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/531946b1095796df7e9b88d089fe3734/lokobozal.pdf
    • http://steelbo.com/uploads/admins/u0/files/20210531135232.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e92c8158a46---taketema.pdf
    • http://stpatricksreunion.com/clients/84553/File/xulebukupekemefaline.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/b4e7dfc03eea91046fa71aba9a579af0/bojoxugudipoxawere.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16075f01eda358---xumafozixalumeluvedivat.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=components+of+data+communication+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_off0000df59.bin
0aa4539d47a7d29e0d4cf2806af91cebf0847432cfd7f6c1c3a6fdf170beaf40
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF59 10768 bytes
font_01_sfnt_off0000f824.bin
6dd4ef35d457c5b8590377dc968f95ec17b0482042ca9680729d22860691ea41
pdf-font-stream PDF embedded font (sfnt) at offset 0xF824 17500 bytes
font_02_sfnt_off0001264e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1264E 16792 bytes