Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e0d949a52f92bc…

MALICIOUS

PDF

82.7 KB Created: 2021-08-12 09:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 025e0f92aedfccaf606ba96606e31ad7 SHA-1: e29dd2f08a532dad0cc43e87cded9e216771f63c SHA-256: 10e0d949a52f92bc8253bbab91023abf5a8e210db3503742becbd699416d5c73
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://queure.ru/uplcv?utm_term=natural+imagine+dragons+piano+sheet+music+free PDF link annotation
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774f1839d13---28202026760.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fda13ceb601---75613126590.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081d48e86908---81479641561.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/45357566558.pdfIn PDF document text
    • http://sanmarinreunion.com/clients/c/c0/c0747301521b2fcd71a0106c9132c7e7/File/moborofepivaso.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608869fd699e1---wanenafafesiduxikatagiw.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/62011468966.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/72529609197.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/femab.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/51d7296ca9b7384e2f1a5df4823a2634/74358509751.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160815d80a124d---74488241568.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a98909f5---8749058591.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/mutidumidit.pdfIn PDF document text
    • https://avenue102.com/uploads/file/gofedoxevoxunuwolabeze.pdfIn PDF document text
    • https://blugarden.eu/file/86706562499.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610fbc37a92ca---fidul.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/digelane.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609a78a11262f---6212025855.pdfIn PDF document text
    • http://industrialdevices.in/uploads/55147944689.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/binesexofawisav.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7aa8abaf0---sodogomelif.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_off0000dc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41D 11144 bytes
SHA-256: 0db764d752ce582e2a47aa0b7cbdab6002a7f9cc190e3c35f7c7cd00acc2b1ad
font_02_sfnt_off00010db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB5 18140 bytes
SHA-256: ba3cd2e73e524d5f61f543b808569764fe3dbcd2e6e0d9acc893bc315356d21e

Open this report in the interactive analyzer, or submit your own file for analysis.