Malicious PDF — malware analysis report

Static analysis result for SHA-256 d649248497909eac…

MALICIOUS

PDF

78.1 KB Created: 2021-06-26 04:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0488009801b2b8b75307688c5a0cb92 SHA-1: e9b1b820ae330ffc9923ea4b9a11ea8f07a90edb SHA-256: d649248497909eacb7657a6fc9ef5395a642dd5113d22621c2cd8a4d64f35c95
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous compromised websites, likely to facilitate phishing or malware downloads. The presence of a 'download button' heuristic further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/9d02eeeeebf37012eaf53638c45816ca/tatubejuruzuxobu.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/emq30rbh1a3lff3a42q3s51q9o/wapataselefubuxumizuxesi.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a651e0735f---54924380322.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/52683109b720b917f21f6e8265430a3e/rejuwobejuwegi.pdf
    • https://uniqrelation.com/userfiles/file/nefilafaxanifube.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/q6j6f4jj16ldesoevmk0t0q1vn/77529292254.pdf
    • https://all-stage-meditation.tw/uploads/files/60cf7b29ebdfa.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/cansr4odiiunbej7biqa2d8gpc/61120313846.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc778af9c3---nuzagozeg.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c49b89672d1---63322128171.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/074522ba8f243ebfc265a7be03c15236/xesibixixedumilefaba.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cce8157ebc---30444560151.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160890936a6b63---kudomuwuxivaniwawizov.pdf
    • http://asbufestival.com/uploads/FCK_files/file/zalebovizekesunepol.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/n3of129ra0b86mcvrhbamvjo18/derugolexugagobivit.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea8fbb47f8---dozituma.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/o3hiknen29ct0jds0pu0k1hbsq/95107117054.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a246791ed84---jegirivigarirakemuporo.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/311cd24e335f2d07a30fc9d28fdcf5c1/fitiwobitu.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/54a0639f18b5c86791f9dbc478f2a56a/2825430696.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/4d8c39b34f1d5e27ba8334325f638176/27695630852.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad979d9f19f---99200872041.pdf
    • https://ladangmimpi.com/contents//files/xelasakerepokiwab.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/05c0d82eed41026ee25bdc116ab66e8a/71971476023.pdf
    • http://adaviestransportltd.com/userfiles/file/balavatakisebonixelew.pdf
    • http://goldway.jp/upload/board/file/giwuruvunutovusuvab.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=ps+store+greece
    • 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_off0000cf68.bin
1f3a78d3b54bfae5ae309e550b0ddeac604b339e7ffbe88e6a9fd01a583b8883		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF68 17332 bytes
font_01_sfnt_off0000fd13.bin
830cb00ec86acbfa4a53ceb71740375dec8fc5e482def66316fa0faa9a645b43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD13 10004 bytes
font_02_sfnt_off0001136d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1136D 16792 bytes

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