Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e73f049ce0707f4…

MALICIOUS

PDF

86.4 KB Created: 2021-07-04 02:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fd31c5e1b63ecfa1c36333856eedf1d0 SHA-1: d9ed2b65c49b595dcd9d84af01f20435dbcec9b8 SHA-256: 8e73f049ce0707f41c7a9a7a92644d00d303e7ada106839b4d6c984b726476ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable domains. These links are likely intended to lure users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://tajeer.co/userfiles/file/26784962339.pdf In PDF document text
    • http://digifast.cz/userfiles/kanojofukuwatebefoviwidin.pdfIn PDF document text
    • http://teakdeck.pl/files/file/65378811869.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/df0a40cea73bbee956a2624f1f41f99d/96328475533.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/2fe6ac549bdf632a40d79157bb69a9a2/5889154590.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/damaruzi.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093d0b5c45c6---zabuzibagivovibenup.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/67021346387.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/ba5b7caa36c1def010df17d14a044db5/70975522322.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/73735267961.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/makamakaxovezo.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609983ac75be5---83126404786.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/ribovavunotudepar.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/vekewodelulik.pdfIn PDF document text
    • http://idroter.org/userfiles/files/33511608279.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/mumituwubo.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf0db39a0a---99634010905.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f70ac66c1---mevusorov.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/cb177baa9068f7d133da64a73973c1d1/xeladavazirawokevaj.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/fafatavokojuwadolatuwa.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/8b5d99a38fa001c171f09d7c29a77d11/vimexazizuzor.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/47921750891.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/guzepodipezebigor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=which+cell+organelles+are+found+in+both+prokaryotes+and+eukaryotesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F0 18380 bytes
SHA-256: 56c2c7cc380a20024b2c36c832a74c679dd598f7a0f02ca9ae80f676a29b99eb
font_01_sfnt_off00011959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11959 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13170 11340 bytes
SHA-256: d26f5aa3683b8122036bcd48b211eb7dd9863cbfa49899460fff724c7f410879

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