Malicious PDF — malware analysis report

Static analysis result for SHA-256 2244d125df302773…

MALICIOUS

PDF

82.0 KB Created: 2021-09-18 04:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9c2805166174a8c7f5d55b9f7cf81e3b SHA-1: fd84a2c166c56c09b9592f6502eb0cf61e59e30c SHA-256: 2244d125df30277322bf7fa33445e0a7cf30689f8d9ab4276787013a13bccc3b
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress upload directories and disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • 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.
  • 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://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b929425ed2---26651212326.pdf In PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381a9dafeb7---vifibusanerusozaro.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/rolaruzekopozefokekixava.pdfIn PDF document text
    • https://ip-pharma.net/data/files/nolafaxedakoke.pdfIn PDF document text
    • https://seerupit.dk/assens/file/79721263424.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210911_73EAD1BED05FABCA.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/mliqf4r8gl6unt8epm1cp0ovp7/45169915140.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/77436572089.pdfIn PDF document text
    • https://h1t-url12shio-turbo.com/contents/files/67627115312.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/dosexanagakanitipazuluvog.pdfIn PDF document text
    • http://stnicholasway.com/userfiles/file/nejalufidarabijixadowiki.pdfIn PDF document text
    • https://valergences.fr/userfiles/file/nomadanuwapozomuvozewu.pdfIn PDF document text
    • https://agrando.cz/files/file/97064523237.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zarov.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/zidopelorol.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/33590628332.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a82bbcc4a7---ledogagejizonutogup.pdfIn PDF document text
    • https://schmitz.cz/res/file/jugopuriwufafezi.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/26183474540.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/82293481544.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/jiwepifunijajesunibuda.pdfIn PDF document text
    • http://rotarytattoomachine.co/project-new/christianbook/upload_images/file/dijifopapeme.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/2108308400.pdfIn PDF document text
    • http://vipdiler.ru/files/file/10139643086.pdfIn PDF document text
    • http://cwpni.com/userData/ebizro_board/file/61737645561.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b31a33c705---tiluwofozubitovotugata.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=collection+water+cyclePDF 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_off0000dbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE7 10288 bytes
SHA-256: de702bbb8cf1a0218b822a43a8eddf8b1bdfca5e081bfcce3e477d3be16ba26e
font_01_sfnt_off0000f346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF346 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B58 18200 bytes
SHA-256: 61983185c96930fc31855acc83b50ed2b10fe2b0cbb51b982f2841d8411bcfd9