Malicious PDF — malware analysis report

Static analysis result for SHA-256 97988ff2fae4e7ec…

MALICIOUS

PDF

86.5 KB Created: 2021-08-17 22:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0a340b8426c18cd2148c2772213c920c SHA-1: c013d830f6a02b2af4b368214dcfa3780cc7dbfe SHA-256: 97988ff2fae4e7ecf0187e20ae7c99bc06be284c3df0c2ec7b674e70f09585ac
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics, suggesting it directs users to potentially malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic strongly implies the document is designed to trick users into downloading and opening a password-protected archive, a common tactic for evading gateway security. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://riviera.az/userfiles/file/nolamokoxetabexi.pdf In PDF document text
    • https://novahealthclinic.ca/userfiles/file/7395993433.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609852f0db120---kinabebitibofudikeler.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/41403802964.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/46389565428.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9e79224da---wipofagemomamutoxaxiger.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/sedafiv.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ade50b01189---kawelabovu.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/la8i6aujoaotuoto6a0ominl05/fidalu.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/f0b2bab0c88b23d80c57016c2a36020e/dulasefud.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d42d2b22fbc---buradatoneraziguz.pdfIn PDF document text
    • http://hkalc.com/userfiles/kugetogalugufufepi.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/5910405478.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/vutonanedepixiva.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/mofamamojupiramediriwugop.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/laxokizuliginogab.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/7d70e707c2b04a164456eb05960281eb/zuzevowodivuzinukit.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/2m90hmc5pitis0fqik17eei9o0/77975914705.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160860fc11fe9c---63543748680.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/9afc02240262a1430426b3eeb57c0ba4/77972976159.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/7504272031.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7e7373842---panolofewijix.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/81359566350.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=como+sacar+dinheiro+do+picpay+no+caixa+24hrsPDF 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_off0000e82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 19272 bytes
SHA-256: 6264a9caa50c5ba6c0bb9e07ea1d65e9fe8412ad496f42c84578fd4b92ee917b
font_01_sfnt_off0001178d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178D 11080 bytes
SHA-256: 250ab7e33f1d4bcca2015ac6c3cfdcc6150b91d9085c1ed51512bd72c7f02b21
font_02_sfnt_off0001314c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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