Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ab2d1cb4104128…

MALICIOUS

PDF

134.6 KB Created: 2021-06-29 12:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3e9f55deb8afa17b3ccbbfa6579e3f7d SHA-1: ba8aa96d64221741e5433f1416b9a7ea745a1fe5 SHA-256: f0ab2d1cb4104128d8592d8a101754d67be26c448a0ffa22505e9ed20fd54529
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5093

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/a4820627325e8f19380092162c09462e/rekagug.pdf In PDF document text
    • http://hytechplus.com/userfiles/file/nefexuwilabasavejogugog.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160da894af2a87---setabosube.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c67dd55cf---mebibo.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/79725709605.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/ddaff9c2d722948ffc7ef8fbe2235ed2/60627701666.pdfIn PDF document text
    • https://go2germany.ru/files/file/vurunamasese.pdfIn PDF document text
    • http://cokhibaosang.com/media/ftp/file/70472237139.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/moninovedimo.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f81fe6fa26---rovavujiwiwafasugiziso.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096bb913bcc4---gavipomuwavafera.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830e753c333---27635410098.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/82086620964.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606cd90f61dbc---26472750211.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3813ab7c57---46107713677.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/61885354071.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/4877c2460530ebc9ce12eedc9ae7790b/wibupanesebusuberefogetix.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/8vo5qddihsnj7ac9jiaubkk9qr/22440482066.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/g4hophmd4a6qct00tnfb5g4igc/mepisofuvarofalusofopof.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bca1540b6d---45538352872.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/427b2ae4d379cd97ed8a195e78423c38/34404997442.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/498b1597be2cb7283dd41c9abce49680/dotepebuxuvebetewose.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/an8gsd5gldteetb0f1u158n84i/19540441609.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=stages+in+psychosocial+developmentPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B19E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001c9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9AB 1696 bytes
SHA-256: 28c5bcedffb0f63c0f18ed07264126f7c833899b916de9a351f9850be7cb6bae
font_02_sfnt_off0001d1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1B7 17224 bytes
SHA-256: b76658d2314bd2345656dae5d5d5ea4bbc8c7c1f2793a80d56abf6c27ba667da
font_03_sfnt_off0001fea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FEA5 11116 bytes
SHA-256: ed17b69f055e5d7cc5dfbb1e537a0ab53ed6218149986d129de48e1409427717

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