Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad430c096985d28…

MALICIOUS

PDF

93.9 KB Created: 2021-07-20 09:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 56d6f623f9cac3211a10e473077b759d SHA-1: c2be534b5ddd65979b8e8c5dc9cab93fa55bd4a6 SHA-256: fad430c096985d28c7bc72ac66b9c26f9c6a1be69fbe899d4d2a5e66b7708e9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://tractorpulling-emmeloord.nl/upload/file/21856049164.pdf In PDF document text
    • http://baigeleather.com/userfiles/file/laxoketexixivimazu.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b55ca84164a---wodopazovubi.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/vejiwonexuberox.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/200047088548.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce72ca8b7b---sakusifinikupidemuvulo.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/92539290421.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210612_39C9A449DB821BF7.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/pofofalufokixaxixosijivo.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/duguxumazosulabux.pdfIn PDF document text
    • http://geraldkleinlaw.com/ckfinder/userfiles/files/godunuwabitilujafojig.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/60410137208.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/fefirofane.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/10778595377.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607288131514e---mepokixubavijojune.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/60185103110.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/finapemizuzasaruxuvapot.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/9d1n0te4nvk6vk0tnb4f317b63/kiwutabijufazivodukifefaz.pdfIn PDF document text
    • https://faltprasten12.se/anvandarbilder/70/files/95046742961.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/90196822653.pdfIn PDF document text
    • https://roshindelivery.ae/userfiles/files/50394767903.pdfIn PDF document text
    • http://farashimirooz.com/files/bubuxujefigizorulevilotu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=monastery+meaning+in+tamilPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EC 21848 bytes
SHA-256: fb16be2e0c72ac32d9661964805ac321db65299e9c6d45568d78de02fe7c9e8e
font_01_sfnt_off000117bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BF 16604 bytes
SHA-256: 1e4a27ed37acc63a2e7b66a182c2de178d50e32440d049ff8fd73a00279bf1ba
font_02_sfnt_off00012f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F32 10556 bytes
SHA-256: 9642f94b54378232b128ce5d3b2112210cfc321e5dc6e861d767ea744e1037cc
font_03_sfnt_off00014748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14748 2312 bytes
SHA-256: a71da1ce169553190ee91886e5ead5efccb195793b7476ce3685cf9ca69fcf47
font_04_sfnt_off0001518b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1518B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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