Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe250cf42f0044b…

MALICIOUS

PDF

79.0 KB Created: 2021-09-17 16:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8a3e008e2400f37ce9afcd4474db862c SHA-1: e086949e73f2c0b99faaa137ddd87ea0f44e4d4e SHA-256: fbe250cf42f0044b9a7c68fc54acbae03abf68de00a0ff43f1ef607f5414ff92
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's purpose appears to be to lure users to external sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://biolabsrl.org/userfiles/files/37171800517.pdf In PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///77960534574.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/rujotinuwis.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/e4acd16b37edc4c06ea5acaa62e5ebb0/76777553464.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161364d2e170a9---73568711637.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/xumakonaw.pdfIn PDF document text
    • http://lmtechsolution.com/userfiles/23563595185.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161318eae904e1---8405279077.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/99082053794.pdfIn PDF document text
    • https://artcorner-fiberglass.com/userfiles/files/wubixewisiwibupozodizajaw.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/13023983265.pdfIn PDF document text
    • http://agisinfo.ru/uploads/content/files/69164938540.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4e3ac0043---81136326516.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/penewisonunazozipazax.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/bifujuvuriladurap.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/potosuxevukunipewesuxosot.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161372919a29cc---sidenepaluxulurup.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/60437914728.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/18880b35057fc12b6d46572a84744951/74937392353.pdfIn PDF document text
    • http://pevak.info/UserFiles/File/wugodowisarefewude.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/58799743078.pdfIn PDF document text
    • http://becskeicsodajo.hu/admin/fck_upload/file/3141995182.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=happy+wheels+dadPDF 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_off0000d3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EF 17120 bytes
SHA-256: 56179c8b083395351d505a8589297bbe9ba48a60165a17dc6f25e1f85c60f920
font_01_sfnt_off00010019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10019 10168 bytes
SHA-256: 0b3d804d1f0ed38455bf1b9551ca65b2c91892a138e451e28c8947e426d953e2
font_02_sfnt_off00011702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11702 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.