Malicious PDF — malware analysis report

Static analysis result for SHA-256 34eca34e031390c6…

MALICIOUS

PDF

84.0 KB Created: 2021-09-02 17:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0b9b7008f22defe1357024c56f6ad02d SHA-1: 569b75005e2ccec5f1c317055c5f726993cf4354 SHA-256: 34eca34e031390c629de21698946300bb841b0e7c45d0a6f0aa7e049453b3aa2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites. The presence of external URIs and the overall structure suggest an attempt to lure users to malicious or compromised content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://krisoc.ru/uplcv?utm_term=haccp+principles+application+guidelines+pdf PDF link annotation
    • http://esllearningbydesign.com/app/webroot/files/file/famifududuriroxeviloge.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/7144105081.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/mgddie4ke12adgm4u8mcko7rll/famomekisiwujelosipiwefe.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/1cba8mfgd8i7nb93n002o4c442/6756481353.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/2n6eriqodte1sue1c5618eior5/safeko.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/35614780858.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/9019279dd6ff73af3bf8d5763a61e837/47727852228.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/46000562718.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607b42a544646---73454646103.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/59394462516.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/vedeno.pdfIn PDF document text
    • http://theettiares.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/fixovavumugogiw.pdfIn PDF document text
    • http://gulfapex.com/uploads/file/lulubasixedo.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/15818697946.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba182912512---bomuvepalasipoxujuj.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/e33b3a9b431cd14231e8374492125107/30711463811.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b4f89d92f---62600093233.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/xotimulibanop.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/72534914904.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/tolusijojowekaw.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/27517064975.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/0b24e3946e2013e79a48938dd6bc387b/narajir.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/64035684510.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/50234684350.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7a9c387cf---kukitivul.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/f58a77bef1b452e23f7bf9f3588fa606/11611179477.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000feed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEED 10888 bytes
SHA-256: 858aa1de5eb9b730c04f914dc66f293a9280ec4ed62e0568c071d5a80cd3051f
font_02_sfnt_off000117f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F5 16304 bytes
SHA-256: 58210839ee011da1cb8a39225bf04810f0924076b5fff5f1b280b996719a2ca9

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