Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3d7f06dbacfece…

MALICIOUS

PDF

92.6 KB Created: 2021-08-13 08:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 70fcf7feea3cc6fa64d21943757cf133 SHA-1: 8d440f25971ef4e9e7a8ebd34a0c32cae4f7c4c0 SHA-256: 2b3d7f06dbacfece3eb9f78b0f129e14188104d1ef576f84c8b3a61d5a8c815f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to lure users to malicious content. The presence of multiple unknown URLs indicates a potential phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ed54407de90---3486444855.pdf In PDF document text
    • https://loyallcanada.ca/editor_files/file/90485909375.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/cc6gts8eim9kfqg70b2ru230e8/84592385607.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/98583030668.pdfIn PDF document text
    • http://agama-rc.com/upload/files/tulewijorapupuvumexilotis.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/21512086553.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a8781ea11---kowajusarolojapofo.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/xutuzanalelorexifuvulurem.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/32998856514.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/0f834d922204b7bf1e32a1eb5d4cc822/mujudirofemuvum.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/4q5cb3q8a2ij12fdrge6gud7aq/86471546700.pdfIn PDF document text
    • http://nabisori.com/userfiles/file/fowitedesikalana.pdfIn PDF document text
    • https://luminex.pl/upload/file/sotaxegusatuzomomilaruj.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161002ba40ff3e---79206256616.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/87499007466.pdfIn PDF document text
    • http://benetalent.com/upload/files/niguzubejavavijufip.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070366e646ef---96443969341.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/kedinifufajetek.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/rn8gudbno1k6804bj7iktpunds/10071468142.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/598385153.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c09d54ff46---28538043488.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607da63fa627b---67132540796.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ae1191cf6---69688501824.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/muluzeravapefedabem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=the+call+of+the+wild+worksheets+pdfPDF 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_off0001063e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063E 10756 bytes
SHA-256: 94aad8a37f8e78089a8343fdfff9519e02aa44844a05154d6c5cd8a0b30d013e
font_01_sfnt_off00011f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001374a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1374A 17244 bytes
SHA-256: 54ea404548587f21597628565015d2d40682aba0fb44c2018eed442e765513da