Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60a2ad886310a09…

MALICIOUS

PDF

86.1 KB Created: 2021-06-28 09:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 39094976827aaafb12b31cdc92077d42 SHA-1: da798b93f28b9387050069ed9a2a2692cf5e8018 SHA-256: c60a2ad886310a0968dbc8ac65906fa68576ebda54dc371b71e0f45867a58c38
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and a link farm heuristic indicates a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607497450ea4f---24421043681.pdf In PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-4-29/20210429192924123997.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/94f0f73dbc20343d68b683e167054148/vubetedawagaxugunojut.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/acfe5e372fec16b2d06f180d6306135a/47122800658.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/19d2e86ef1b9f08648fb9f4df3664fe0/dezunesamopasapisesitolo.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/2212154239.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/70025250342.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/63cbe172b953c84e2665ba1b0f15e475/fuzogonuvarojufatomo.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/d6ibt4rba8tsge7bhimktpdcj6/13961093006.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/15/file/20210515_215810_103.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8018d0a57f---90331359976.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c430e79cd4b---funejen.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/6a9d296ac8497d95393d64e99683e492/lojiruputosodi.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/f276c12759ccf89a1b7826dc68387071/54599461185.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/zevoruwefamika.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/jibukites.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd39520323---71145379073.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b8b2a9b0d---32735911367.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16090ce1f7e0f8---piwigelezesibutawasevogem.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/8k186rg7ve4dmrkjv52u07n7ek/4253681199.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/ffef927c0c66582aebaa98ec997063e4/76255697972.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/58023523387.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/subedojosiserirevabon.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//19047630480.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=literature+test+questions+and+answersPDF 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_off0000ed96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AD 10484 bytes
SHA-256: 3d310d5446b541b392ef7bae622f06a3c639281c9e032f5bdbaed54f7154d695
font_02_sfnt_off00011d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D75 17360 bytes
SHA-256: 2712e99ee27021db3167146774281ac92ed9579e4a267cbb2e7667b0a899e2f4

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