Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14cc934fe36ad41…

MALICIOUS

PDF

102.7 KB Created: 2021-07-13 22:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9ee4e60549e4b9851714f1b18ac836c7 SHA-1: 4c1ca9170f429d48b8a7f7a5b0abf15893bd3a07 SHA-256: e14cc934fe36ad4174e4d9c15be49a49d5e975bfcd1c14b5cd583d28e83f5efb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The 'SE_CALLBACK_LURE' heuristic indicates the document may also attempt to trick users into calling a phone number. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://crysiq.ru/uplcv?utm_term=dsi+operations+manual+number PDF link annotation
    • http://anandamsanyal.com/userfiles/file/zafozat.pdfIn PDF document text
    • http://phillipsbrothersmill.com/clients/6/65/65192871cce8a6e36080a9ebd2808b02/File/mobaj.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/wagodupi.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/ruligedefedopivemar.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/66007698950.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d50c419a02---novovujuzelus.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/duvuretiv.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7ca8c2db9---68309702493.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/tuteliz.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecde71d9a1---21978496976.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d99b6771cbd---57003941758.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/fatiborajod.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a175c4842e6---pujemi.pdfIn PDF document text
    • http://scro.ru/pic/file/90171648536.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/70527240228.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/zegakuwa.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e1e8c5d19275a47f240f83a4969087ad/veborigovowug.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/mifivibejuwenu.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/02f20a342a7a1802b7519900f917772a/77848921200.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f9bd77150---52669705968.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/xatoboxa.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b07eec7dd---gegafurifebukewekigo.pdfIn PDF document text
    • https://oversaslogistica.it/file/jusabi.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/09f65f96b23916a5d0e390b142a2a45e/wuwaju.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/bepifuzogumolitosafo.pdfIn PDF document text
    • 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_off000129ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FF 19004 bytes
SHA-256: bf8e0f77ce9598ec0e3b506b9f304ec2a7b10f96cd4925bbbf2a6a44f0155239
font_01_sfnt_off00015bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BF7 10656 bytes
SHA-256: 4e498629332af1735302b531239ab4896a6e466ef45c6e9735484e3390058e38
font_02_sfnt_off0001741b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1741B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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