Malicious PDF — malware analysis report

Static analysis result for SHA-256 700ea3a08912d9b8…

MALICIOUS

PDF

78.1 KB Created: 2021-08-18 22:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8e9c6bf48c7a140d45233b5eb134e31f SHA-1: 907b5cf611762ea64a5cb1cbbfc115be3dd3768c SHA-256: 700ea3a08912d9b8ad587b07ac5233138213d75e8f23fb3cb613afaa8c8ecb0a
156 Risk Score

Malware Insights

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

The PDF contains a link farm, with many URLs pointing to compromised websites or disposable hosting, designed to redirect users. The presence of multiple PDF link farm heuristics and a high ML score indicate malicious intent. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 http://naasschoolofmotoring.com/fckeditor/userfiles/file/rusinikuduxuwozivadamodur.pdf In PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/80676899f351958475feef7dcf381d44/99443627952.pdfIn PDF document text
    • http://odmooregolf.com/clients/e/e7/e7046aca88cfcc92de0be8f3f6b3de3d/File/80149414576.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/41121baece959cdcc8713b118f39b0d9/34568436827.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/t2g08b2o1rhv7i4ome7rgp4ub2/83881586456.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/1754663770.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f623ee22a3f---73739687780.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/75976583367.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608359bd9b0cb---lutikukitu.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/18297588391.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/90023693982.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/c4889ea96053dadd8d274c5c1bcad798/63994908448.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/xudiguxodofulonow.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/1497a8a8c89effabd594b59e681a355a/surivevam.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d389042dd9c---84972808577.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0a6e0f96c4085512890b9829a1922ce5/1090280244.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa81aa6131---88733162065.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/8j9l5cj4a9sv2f66fep326t2go/namarubaludonusatazafub.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/87339596527.pdfIn PDF document text
    • https://stoneappeal.in/FCKeditor/file/23500888920.pdfIn PDF document text
    • http://domosplast.hu/files/file/bixurogajowava.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3b341a7c1---wegubik.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210606081159.pdfIn PDF document text
    • http://markone-tools.com/upload/files/zokato.pdfIn PDF document text
    • http://healthywithhart.com/res/file/nabozuxafagonedunamopoja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=percy+jackson+and+the+olympians+lightning+thief+downloadPDF 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_off0000ca79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA79 11488 bytes
SHA-256: 66bb2eddb8dfb45679b2652b021711f8029430721282059281e44e2f5b691ccb
font_01_sfnt_off0000e54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD61 17292 bytes
SHA-256: 732c30b375f2d42174466d349b1b552ed3dc2d2a1c587f36f239e6c2b1b056a8

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