Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabefe2710f45a71…

MALICIOUS

PDF

80.9 KB Created: 2021-07-07 05:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 161ab17d299411f8aef0a8ee5b12e815 SHA-1: 97b19674b315fe096354e0b0b02f7acd98d96142 SHA-256: cabefe2710f45a7152c46ea5e183e1b9dac7376a896db29a818ea974ffe011f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or are part of a link farm strategy. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or redirecting users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://infrive.ru/uplcv?utm_term=dsp+midcap+fund+direct+growth
    • http://clinicaveterinariagussago.com/userfiles/files/sugufumag.pdf
    • http://www.mustwalge.ee/data/content/files/xaxefe.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a35ee31ba5e---14673574209.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/69377f1d7ef1e1526adf3903e7a31ed7/36151664299.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6fff6684c---boxokaf.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080dc62cbc3f---99181503257.pdf
    • http://paillasse.hu/userfiles/file/72241671061.pdf
    • http://sungsam.net/userData/board/file/komusajaganerep.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/6fd07d46d23698575f368f2b1bb0b4c4/53427273590.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d36f6e215---lasil.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962f5e09332---wodilulununokoxuzigug.pdf
    • http://npas.ru/pic/file/83055227939.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072ba755c34c---motupi.pdf
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/bosisanibuxo.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/cb6362a6f92e3f1e76c7578b56866517/xitipavunaridirewiminaso.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/8vgpssj72addnughaa5lvp6jqc/66602954822.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/dhbvd9k7ih94a6g05428ns7oa0/poxusopiwojusudu.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/ac74c264ee6782148f2e91e57b6a6021/zesopineresitidikifaku.pdf
    • http://hesexpo.com/img/editor/image/file/49576213029.pdf
    • http://www.haztartasigepszakuzlet.hu/pics/file/71961789704.pdf
    • http://panteres.com/files/files/benomupipogiwepep.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca3d054029---mumasoguvifabokejetof.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfb3f4ca47e---panixeguze.pdf
    • http://lucann.com/Upload/file/38735819109.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e2d78d32---mifakiguduvimeti.pdf
    • http://myucmas.com/userfiles/file/1949727939.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/bdf36f5250990f443dd356335abd0fc8/65315638246.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_off0000d3be.bin
9155838a949019bc8c506ee392e38c0eadc528d374eed631a486815a30d7314a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BE 18188 bytes
font_01_sfnt_off00010401.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10401 16792 bytes
font_02_sfnt_off00011c18.bin
22b382f17a827f231ff67fc05987d22d6aad8e5788724c47ad36b0912d574ccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C18 11208 bytes

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