Malicious PDF — malware analysis report

Static analysis result for SHA-256 01429dcad7e918be…

MALICIOUS

PDF

93.5 KB Created: 2021-09-17 11:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 67cd90b5d06307f4f22318a08d9b62d0 SHA-1: 121a0c072a8f5a8fe718b3ce433a5b5851946fb4 SHA-256: 01429dcad7e918be189792b6043346fa241feaeade878549bf30a63dba738d67
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329b6a07063---58876261224.pdf In PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/i5nojmlrpqsq6kkabdbs2gfj8e/19443338758.pdfIn PDF document text
    • http://clinicaveterinariacittadivignola.com/userfiles/files/23234717811.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/tarusofokaxorafez.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/51443878286.pdfIn PDF document text
    • http://tartak-monis.pl/tartak/images/file/nuwiwokaragokom.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/72571524865.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381d8db5b22---fixuxemimuze.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/26679812023.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/kapetifigudaxifuka.pdfIn PDF document text
    • https://ekransamara.ru/files/dekivugazifavov.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/gurixemekeripujoruseteju.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/61611676728.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/32725808584.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/kopokifejijizebiv.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/39361016432.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/zudadusimavedetaw.pdfIn PDF document text
    • http://goldsunjsc.com/upload/files/55633691172.pdfIn PDF document text
    • http://mathcountsoutreach.org/userfiles/file/vedebukur.pdfIn PDF document text
    • https://invision.buzyhub.com/files/82338502449.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/2041405384.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/gelelijufesavabitoma.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/lexezixok.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/jugefuwoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=fast+and+furious+9+full+movie+online+hdPDF 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_off000102b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B8 10928 bytes
SHA-256: 1a0d24d66b66ec91f660b10d61632dd4e174dc98a7025abe2788d35c4a24db04
font_01_sfnt_off00011be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE0 19928 bytes
SHA-256: 710633395a1dc1e1d3fa4c858f5026dd21a306796a032cf10bf4a7696f2208a7
font_02_sfnt_off00015011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15011 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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