Malicious PDF — malware analysis report

Static analysis result for SHA-256 301832503323bf05…

MALICIOUS

PDF

77.9 KB Created: 2021-09-05 00:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 81dded3a1ee1eaa2f29caf4fbc0ea9dc SHA-1: 85aa432e3e58d9124676cc7fa660ec8575b1e800 SHA-256: 301832503323bf052903dcc50eba8c8ca1eebd38a4aeedc2ec60bfda75ef43ac
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites. The ML classifier also flagged this PDF as malicious. The presence of numerous external links suggests an attempt to redirect users to potentially harmful content or for SEO manipulation. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7384

Heuristics 4

  • 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
  • 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://mobilesamara.com/img/files/file/romegenoxuwajagijakiwe.pdf In PDF document text
    • http://vinczeandlaszlo.com/upload/26243467891.pdfIn PDF document text
    • http://kenhuffbuilders.com/userfiles/file/zavebaxawivizesofupenerok.pdfIn PDF document text
    • http://ccmyungsung.net/userData/board/file/favuja.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad01501f943---43627790680.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e880235b4ac---30402686805.pdfIn PDF document text
    • http://biosite.ru/images/news/file/pisokaverejodokepuxex.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/gijojasolekaxenexok.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/fexedepefutevezi.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e6609a76a---siwadigoveriderenadeg.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080a2ce7a265---likabedovogefavasina.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45de18d17c---bemufowamiwezilasevo.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084132ddbacb---livetajofenizopesusugo.pdfIn PDF document text
    • http://topflexsports.com/uploads/61036935487.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/c0be4272016777a0157a281b1839fd91/ponipumoweluzu.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160738a00748dd---samafen.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/20117367768.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/60707816668.pdfIn PDF document text
    • https://moolans.com/uploads/files/posapibevatukuxalo.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/50661082322.pdfIn PDF document text
    • http://amandamaitland.com/images/file/6663785939.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/36196745152.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a37f57afb---ponirerafudepugarixav.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/ce315a679448b08b1a4a182959ee88cf/kakirijodisonoguzaziz.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/sezuxewekobukuwop.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/b252f179fc34368d974d9216ad2ac668/380739000.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=blueprints+neurology+3rd+edition+pdfPDF link annotation
    • 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_off0000dd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD70 17712 bytes
SHA-256: da6131d86e5fedac159f6f966819fd899bd73951b1b4a487b3868943bc85bd8c
font_01_sfnt_off00010b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AB 10952 bytes
SHA-256: fe5d5290981f7fd08d3c7e87dea30195f99bb05aed774bbdabb3b3693ce22484