Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6322048eb67992…

MALICIOUS

PDF

90.1 KB Created: 2021-07-25 04:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4cb35eeda8f45302cf9b622bc69dfff6 SHA-1: 18b2e2d4224c70a4cb0d5ccda7a6e021eb7b15b2 SHA-256: 1e6322048eb67992b5ff04a42afda0c1ef0fa2d589e3816ec84a66db67de4199
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised CMS upload directories, indicating a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple links to potentially malicious sites suggests an attempt to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3a4d1ad91---dijuvotimedibiti.pdf In PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ef609e3052250a2debcaf4d09a6a2484/35573769926.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/o70r2t7s0cj38cmrqrbumj8is2/tututirobokuvorosiwefopef.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16070a7bfd5014---zalomubafemeludipod.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/55264373056.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16089eb30c5fcf---makuxugidozik.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/fuvobonurawupoduxoji.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/31b9dcd1754f12955f7750f41bd552aa/67956086283.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a1b7162f9---razetol.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/zajonimofivosunawusenu.pdfIn PDF document text
    • http://talleresjpg.es/img/file/20225632201.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/46977055644.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080e2af6a548---situbokumumolibijenegone.pdfIn PDF document text
    • http://haphadoor.com/upload/files/76368452820.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/79347050797.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/69387465375.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b77101982c---25115089723.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/33869166588.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/zalugowilapixunom.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/tv935t2eee2bo524qeeonjrrbu/32970629930.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073fe9aee857---27735913781.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7efe6641e---28163101386.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/cc7d38da8e71634bfaeb601fbbb2a9d7/48683403059.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=elegy+poem+examples+for+high+schoolPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC6 16640 bytes
SHA-256: f0b5692f169d0921f669c69ebf44652ecf6ec496d8a12afff922d8cbfa88b00f
font_01_sfnt_off000127de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DE 10924 bytes
SHA-256: f45aa2b11a666af66cdda36557c0a8c37cf20fd13f6467ec4e97ecb4713df0ad
font_02_sfnt_off00014131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14131 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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