Malicious PDF — malware analysis report

Static analysis result for SHA-256 badc118ccf4276d0…

MALICIOUS

PDF

86.1 KB Created: 2021-07-06 20:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 68524ec0b29c6884773b8d7681808e82 SHA-1: d3aa938a8c720f2988ce799bfdb63af7cf3c5e18 SHA-256: badc118ccf4276d0cc7c4ad5ca3c1401110410bf030476f4c13889864ecfeeca
156 Risk Score

Malware Insights

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

This PDF file is identified as a malicious phishing trojan by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that likely lead to further malicious content or phishing sites. The presence of multiple external URIs and link farm heuristics strongly suggests an intent to redirect users to compromised or malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crewmak.ru/uplcv?utm_term=porn+game+mobile+free PDF link annotation
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/gofudi.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/dodoki.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48727e6b9c---742005127.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/h7iaar88pgreg0ggf6hhm41t36/21408026750.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/9633475e8652ff0117789eadc0f55f8e/35851251924.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/zopasof.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/600f90cdead720c243c2f7bbce9c04f4/24739632368.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/59974713222.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ec538a146---97821686459.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/95790598903.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/fbab41c0f3840ef6bb0ed1ec6735a68d/jokisajogaditoker.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/gogiluv.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab47ff2837---wolatupa.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/511e3205202ef181098b18def9f93b18/mobifimofinozofimiw.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8fb9380f2---vafelejufax.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/5afaep0bqp3n2ard7lgvfm1lus/vexeguparug.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/dc2bb445ed964fb3f62610232d2144c8/bujirad.pdfIn PDF document text
    • https://pilisilovaskert.hu/ckfinder/userfiles/files/17997450186.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/421f031ba0ed463006cec55bdd7aabd4/2959228501.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf51d573c7---dakasonuvuzon.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/72614430510.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/56669913092.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/2419e1fa67db312402f781fb6a184207/zozewusexujozuvu.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/2hkl2n2kcec6brabbts1mqmm6u/13495332856.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/jolanevufugezenuruxid.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_off0000ecce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCE 17196 bytes
SHA-256: 75441c75012f6448765a299c31da1de7fbf6c7bc8418f0d26fb36a41ed24b21c
font_01_sfnt_off000119ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EA 10432 bytes
SHA-256: ebcb43d8a577ecc4c5ac081c47297caf6b68cf268abc95fdee88e3214a1fe06f
font_02_sfnt_off00013184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13184 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1