Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f63008a62f301f…

MALICIOUS

PDF

87.4 KB Created: 2021-09-18 15:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7cbc0a7c8bfd4e9db1b3d881ff55d087 SHA-1: c3ed74816a74e29ca4368af9e476eca3e4595b9a SHA-256: 00f63008a62f301f9964c31d0eea41f667b1e7ccfa3a68a73406f21c19fd4b9a
126 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF contains numerous embedded URLs, many of which point to domains that appear to be part of a link farm, suggesting a phishing or redirection scheme. The presence of a URL with a 'utm_term' parameter related to 'bible study guide pdf' further supports the lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://tailormade-sales-marketing.com/userfiles/file/29794034926.pdf In PDF document text
    • http://laiyi-art.com/userfiles/file/sowok.pdfIn PDF document text
    • http://zatuchlina.cz/upload/file/21154108498.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/woparepowunilijuga.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/19548234250.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/83497348263.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/61261582840.pdfIn PDF document text
    • http://mtkshop.com/images/uploads/file/mosabawuzavafe.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/161363138d1de5---gerefife.pdfIn PDF document text
    • https://fleseriuassociates.ro/files/file/getatodiwazojejeda.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/pekasukixukikuxaxawesi.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/9cca88f135ce6cceaf805337f857a1e2/selaladinopax.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/75317753113.pdfIn PDF document text
    • https://abbma.in/admin/uploads/file/taredesadim.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/majidesopomeju.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/zosetufisejejofuwovefap.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/keborenejeleganif.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/tizomovoxosexebudewe.pdfIn PDF document text
    • http://wohingltd.com/userfiles/sosolimejef.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/buvutalezadikasebalododa.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/62157472007.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/nizalafebomeligadula.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/25359301373.pdfIn PDF document text
    • http://armanetti.com/images/74662908140.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=bible+study+guide+pdf+2019PDF 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_off0000f191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF191 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A3 17108 bytes
SHA-256: 4d887ba1c7507626a59be379009d0e5f219e8db9fa6dd23bdb1c6038dbbdd33b
font_02_sfnt_off0001362e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362E 11056 bytes
SHA-256: 1ac8e46ba3dbf09a0fa553650f235862a4795eafd9e80ba2909c17e351f4d676

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