Malicious PDF — malware analysis report

Static analysis result for SHA-256 d580d784c5ae2440…

MALICIOUS

PDF

70.7 KB Created: 2021-09-25 02:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8c17f960ecfd98bb009c6e5df19b2156 SHA-1: 73196e2dcf9d052e860495a2e8ad882fd0efd1e5 SHA-256: d580d784c5ae24401a2f9c2bb0007408720cee3bfa267f61c48d799bcf799d33
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. It contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://baatco.com/ckfinder/userfiles/files/vimuvowelajazeninegeseve.pdf In PDF document text
    • https://recapress.com/ckfinder/userfiles/files/99345617540.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614e164b3226b---femabonebodufoliti.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/xezoxuwa.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/26824379548.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/niwewogu.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/57464303966.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/23037056760.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/52b9fb10f80e75f2b6cd2d69c3d6efc6/319815338.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/8945b4a62410d9ec85312b8303ca450f/korusemetut.pdfIn PDF document text
    • http://hyundai-baoloc.com/luutru/files/64645765516.pdfIn PDF document text
    • https://weishinclinic.com/uploads/files/202109180958094576.pdfIn PDF document text
    • http://architettoannalisatinelli.it/userfiles/files/zozojufebarido.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/38796799471.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210906165224501.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/7171408551.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/19965299706.pdfIn PDF document text
    • https://keluargamimpi2.com/contents/files/83937633857.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/sovupevipabiraguwobef.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/23324364636.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/mifasamo.pdfIn PDF document text
    • https://conrays.ru/f/data/59541652518.pdfIn PDF document text
    • http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/89366828628.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/11281472067.pdfIn PDF document text
    • https://groupunsur2.com/contents/files/28514934744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=macroeconomics+by+n+gregory+mankiw+10th+edition+2018+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_off0000b05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB05E 15964 bytes
SHA-256: 6650caa2200a450a7173fee56f258a373ef47192f8106100153be92500400218
font_01_sfnt_off0000d816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD816 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02D 11948 bytes
SHA-256: 6dc8de0565d85b80dc12d0dccdfde829bb3f871216f8e5340105c975ca738a83

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