Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef586251aa9d731…

MALICIOUS

PDF

90.3 KB Created: 2021-06-26 20:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b0ba056c21984514ea190723030edb8 SHA-1: 1c130906d6764e10a8555df61cb2aa266be00d1a SHA-256: bef586251aa9d731d1a4e0e58bacf8693654764e3f17f3a59c2188a04cb4d8aa
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised hosting, suggesting a link farm designed to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://xn--49s538bo8ux8c.net/userfiles/file/nebatudirakepisezeju.pdf
    • http://aimic.com/userfiles/file/1860834610.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f0a47c587---24328696506.pdf
    • https://sfeerweter.nl/userfiles/files/duwevukalomegug.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/7k8d5nhok359a73p9i7o425p0j/nosuxiburadorumemit.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bb0fd3e1a---69082660736.pdf
    • http://www.alfapilates.pl/upload/file/xulezan.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/5gd8gm46ckpeeg5eh9ig2f2uqa/30749047848.pdf
    • http://cariboohose.com/userfiles/file/47295319594.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16091b9aba9d59---63822622383.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/3ba0a46a3ae8beea234ccd1f279aa7aa/83720055746.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c73356e4fb---lumowuxafinosuw.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a730dbc2ce---26962539347.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160945d3284ae3---ratanuvinapaxixubapos.pdf
    • https://aimhc.com/userfiles/file/zemubu.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/naqhihjb8vtgsdkl8957c198ih/gerutaze.pdf
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/lonikusede.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093c346d4bf1---18709119373.pdf
    • http://keysrotary.com/clients/d/da/da683cbc30bfd632b0b364d14bdd38fd/File/dodakamexufaxegafaxajosov.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62150b20d---dodisefifuviviloxonopifu.pdf
    • https://x-software.cz/data/file/45252105438.pdf
    • http://adaviestransportltd.com/userfiles/file/jizixerutevu.pdf
    • http://ahchala.com/img/file/bomatakapopitom.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a80754ede---8389746056.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d70da23531---40786549603.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084b537b4313---15211003470.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/931d6d7b49ead7aa84e08f2e78417524/dovewedipana.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=inception+full+movie+in+telugu+free+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_off0000fdc5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 16792 bytes
font_01_sfnt_off000115dc.bin
9b7e1de5a8ccd95c88329389b533803f98238032e8cba35723df3e650c6493eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115DC 11000 bytes
font_02_sfnt_off00012f37.bin
67870c5f86c152146f382ba865906703816c50006209b21754dac678b3b4d68b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F37 16988 bytes

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