Malicious PDF — malware analysis report

Static analysis result for SHA-256 2859fad63332cded…

MALICIOUS

PDF

206.5 KB Created: 2021-06-27 02:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 275c0f1219df5d292ffa98b2264d91f7 SHA-1: ca732cd99104a9ed913bcebfeff102fdac18e3b8 SHA-256: 2859fad63332cded925bba901d4fd00a0201232f5b47cd31e0cb66841d372d0a
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous links to compromised WordPress upload directories, suggesting it's part of a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious sites, likely for credential theft or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9344

Heuristics 5

  • 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.
  • 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://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/2adeccfbf883f2d279135221653f63c2/81717613203.pdf In PDF document text
    • http://elite-weekend.com/clients/9/94/945a7f92a07ecc721aac768ad340748a/File/35767351150.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/35039120703.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/7aa59bf6618931525ab857cae3c67895/80839306981.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb49f61ff3---13070488584.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b36227a1c---55102583102.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6dbc2465c---94858841464.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0efe425d63---gikatew.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e7f3c0beb---27814714667.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tonule.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/92399005560.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801ca72d812---gitutewokixopuraduw.pdfIn PDF document text
    • http://fotossc.pl/_files/file/kunijel.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/8b2c50e4b56ca356fcb1b9965308a47f/48969205177.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/panate.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a7729ffc7---92935063366.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/sm5i6el5psre8e22hgjjmoiqd6/lonisusaratijiv.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/19801616885.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/opuiuu4hp0t3bi5k5oj0aa844t/93729184234.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/959567b321b374491a04d49bce53055c/namoki.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021051516152619.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/a37234827c4b468ad7de648bf08474af/sebozabiweduvuzodi.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/eef45cf3c00b1f9bebcbb23e74018d93/99444677950.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=hebrew+past+present+and+future+tense+chartPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002a631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A631 10776 bytes
SHA-256: 84e181624ebb8a205e09f74f9f211071165b1f37fb01d5d732ff37a8a5a5a0ff
font_01_sfnt_off0002bec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BEC9 19008 bytes
SHA-256: 2b7d645cd4e2a96aeacc79a6d16e75f71324b0afff20b01cd08e3ee23f519339
font_02_sfnt_off0002f070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F070 19616 bytes
SHA-256: ff7f0250a4e9bbb274f496bf9fbe2da939d1a2691fa3609937d8ad6b3e74ad5d
font_03_sfnt_off00031234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31234 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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