Malicious PDF — malware analysis report

Static analysis result for SHA-256 db292cd69cd4afdb…

MALICIOUS

PDF

84.0 KB Created: 2021-07-16 17:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 663abd6daa20b5e18283e5fc99f25476 SHA-1: eb6eb4207689dd0345eb05f9c277efb9645d19b4 SHA-256: db292cd69cd4afdb3d9955db2814930435aaef616abc8348edc7111150e7c780
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The presence of numerous unknown URLs suggests an attempt to distribute phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://seednseed.com/admin/fckfiles/file/40360429512.pdf In PDF document text
    • https://stallion-international.com/userfiles/file/9026402516.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/mamuwubavitemisotusi.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/lijefetasarikitebip.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/85504114559.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9330479c0---godowizaki.pdfIn PDF document text
    • https://andrejc.si/files/file/dudominudixukoto.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/tenixi.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/69781905657.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfd5bb3337---93414902179.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b656b97d10c---69556953213.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d556bdd0b29---68577668374.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/10370123769.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/fiwapubulavepesuwu.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/fojetujutejolitabogajot.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/garufaluzipomuvu.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/c8d5981cc64cb3ee1853e06699b3cdef/kekamogukagejisajarogowik.pdfIn PDF document text
    • https://ikima.fr/uploads/file/fizovelijajelodelukuzo.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/vafotazazoloxusafoko.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160bd91c180d12---63069924709.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/63669199679.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c21f2a5eeaf---pazowamozawinajagomuwa.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/12537864710.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=astatine+physical+state+at+room+temperaturePDF 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_off0000e5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B7 16944 bytes
SHA-256: 80138ca2d1492bf2f0157d561991cec2f8b9f69c520811ae58a80e1bc1dd732e
font_01_sfnt_off000111db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F2 10836 bytes
SHA-256: a1128fdd86fa4263704fcd0d38c310fa9bc8539612e54b11b37165839c3ec7d9

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