Malicious PDF — malware analysis report

Static analysis result for SHA-256 8025864f962d6e86…

MALICIOUS

PDF

86.4 KB Created: 2021-06-29 01:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74dd627648baba13459398d5fe9561c8 SHA-1: 5ef23d616a3281fa9b01cb4fbf3cdf1acac53cac SHA-256: 8025864f962d6e8640aa71f84c3ae9555934dec782d936bddf19cd64d120fe22
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories. These links likely serve to redirect users to malicious content or phishing pages, indicating an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0b67aa8c4---xokufapakolatujuge.pdf
    • https://euroroma-bg.org/files/file/nenasolepupifeposavori.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e3d61714b---fusixosuzipevutago.pdf
    • http://drairtools.com/ckfinder/userfiles/files/39671747060.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/3b0a1d3fac17745fcf1f061c5ac7c9f1/58294437739.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aaad594d2b4---53314178830.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9d2b7caae---53385176541.pdf
    • http://steakclubhn.com/campannas/file/madekaxirujikakikil.pdf
    • http://vaness-sens.fr/ckfinder/userfiles/files/43007048042.pdf
    • https://erdenet.mn/userfiles/file/masozexovezase.pdf
    • http://huiking.cn/uploads/file/271342054091.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02b82c4ae1---11033102990.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c2dca14c9---defununiwifutekered.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/po0eo180va9v14r4ble2l1905r/bilukulos.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/60dbc149ee171738e2d5e64bc79383c3/delokajilarazat.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b188f65e4dc---81045869048.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/a65fb673a783e4d4815e8233561ef7ce/duvoxuxa.pdf
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/neba9a8tgsf8t7jm3n3a4pou81/pigavesepabinet.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/3f296d868e8bcb8b9c6a4c175adb0817/82219335887.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160736e901866c---raridikizasexoneki.pdf
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/95717300487.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/b0bc1bdddc63768d528a0cf3ec0c11b1/gaselegasus.pdf
    • https://lensprovn.com/ckfinder/userfiles/files/18803600630.pdf
    • https://inncredel.com/uploads/jirorelalapedabepidivax.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/a4b1b98a53f6ed2f49aa09cdbf1705fa/639912149.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=new+total+english+elementary+download
    • 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_off0000ea1d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 16792 bytes
font_01_sfnt_off0001022f.bin
31cd4cac16abf6f6a221697cbba66f55436dd1d4df6c57e464311cf3d03c2910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1022F 18488 bytes
font_02_sfnt_off000131a2.bin
504d11d124bfe5875592038d638727fe217b275399b135fac7566e1634a343d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131A2 10872 bytes

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