Malicious PDF — malware analysis report

Static analysis result for SHA-256 622cacc07bb16b31…

MALICIOUS

PDF

94.5 KB Created: 2021-07-02 13:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dfe4976201f5cc344c297ebd2e3750d2 SHA-1: 560636fc7d3ada680cb17e29ec947c81ac02335b SHA-256: 622cacc07bb16b311bb04f0442a163efba658d47dc225e7ed6da5a5aa279e39a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://cructi.ru/uplcv?utm_term=miracles+of+the+quran+pdf PDF link annotation
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/bca58dadab76b2b7d2931f5f77a10ec7/95654506418.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/gizapikorubi.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/81a68f0f12479fe34f129438d55cb266/80944073893.pdfIn PDF document text
    • http://arablift.net/userfiles/file/nowewaduw.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28daa12b91---78190210678.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/0c06cabd3486a19b9d84660b1d308f4a/70280086328.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/d0ae2926ea1c2468e96a590cd3401701/80921593688.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1355446a49b318b1f24d22ded4e335a6/64218064894.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/n4han6b698l4tsl9s0ecsrkc6c/nejujenujuzamuraxedofara.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/rurari.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/61618399640.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210616_B18D3FD15677AA8C.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3e6db9bae---tasamasidi.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/2d00m8jn327qldemqr5ajvci6l/74870506622.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/56fdf0692e7e5767d29b598b3b534328/rabaleg.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/65601469e3baf91d64036a5b880de09a/4144211122.pdfIn PDF document text
    • https://cutandcolorparrucchieri.it/file/wegorepaveladoredixipo.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/coad75q3n6utgjm7b1quqgj192/62651341460.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823b4a0041e---kakogugezinemipilewumura.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/mfrtpo2vfrjddr6rqaiuiv1dp1/senoruzeguno.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083b634ecfc2---beripizipabubusib.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload//file/daworapovalibuwuja.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16096a9853f622---75473078943.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 18560 bytes
SHA-256: d09ec99482197b11026a349fb173f86ee9e69b6ef977a6daa72df2cd31ab45e3
font_01_sfnt_off00011ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA9 10956 bytes
SHA-256: 421e983653597ae2c5d8e9b2da3849e1c73c3003e1b608497edffc53c861cbac
font_02_sfnt_off000137cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FDE 17780 bytes
SHA-256: 9e29676853fbaecc1753ccd1844c76eedb5c3629057cfc5c251ef3c51aa84e6e

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