Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e002d420eb39ce…

MALICIOUS

PDF

79.2 KB Created: 2021-07-03 05:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 41a3146bc5d792467cd6c15f98cbc0f5 SHA-1: f749e9f89f7c966a9fe490325bfd76826c083cc7 SHA-256: 95e002d420eb39ce98669b91a98d47fa401ead51d5d0e348f8f4517149435e16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with multiple URLs pointing to compromised WordPress upload directories, suggesting an attempt to host or redirect to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/a41a68389bc8da83ca6e3496401d36c0/jivuturorarebikoloki.pdf In PDF document text
    • http://nzmbc1611.com/clients/e/e6/e6eb4f38db7021b04b945082fca6026d/File/tumaxerimiru.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb46626a9d---zugepelevunavewon.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/a49af92f09bf75af3416c48f51ca61a6/16840245535.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/munasanunu.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607e557bc54d4---46219457411.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/4bjc889ehdlu4oi5cl6g32oj7p/regidagikajuzo.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/beziguvexokobenadavimet.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/49695034685.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b02fe02938---26119240705.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/88679739061.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/48dfd4370e50790110ee8edc3fdd9e31/jogewafikutikuxifupileva.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/jedadaluwunug.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/056s6lk0tf35g3s6s7jm5cph4e/34652628396.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/45134370946.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b2be23fc6---sagidefozunipu.pdfIn PDF document text
    • http://industra.sk/userfiles/file/fujiluru.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/84574958676.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/gmf1ilqkr722brm4p7dss0h479/44275834160.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4f4d8a5d3b6abeebacabe6824206a3ef/gimekugasukulapisenuzoruv.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/mitenozirexuti.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/4dc9e3b2058435a7372e95ffc7cc5b02/57813132717.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=bookman+old+stylePDF 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_off0000d1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DF 17396 bytes
SHA-256: efafe5d312bca46c3cffde609474fe821d4678d3767405d5c8dc410e255b3a8c
font_01_sfnt_off0000fe9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9A 10476 bytes
SHA-256: 873188c04f572ba1c776a14b5a1c89c7b182affec598c841c7c4e680375c440c
font_02_sfnt_off00011682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11682 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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