Malicious PDF — malware analysis report

Static analysis result for SHA-256 687c9dc6ace65438…

MALICIOUS

PDF

79.6 KB Created: 2021-07-13 22:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ddcbaed426e2c26276a9774ad6a11e64 SHA-1: 849f274769ee64cd8d1f71e0f74e0932c1c570d7 SHA-256: 687c9dc6ace65438ede0b263144bf7dac72973ebd9524785732e3c007d285e05
124 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The primary goal appears to be directing users to potentially malicious or compromised external sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.2479

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
  • 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 https://angelsforwarriors.org/userfiles/files/fawujedajutozezusaloweva.pdf In PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/namudesesokimalawoteli.pdfIn PDF document text
    • https://webmenuplus.com/images/file/gegop.pdfIn PDF document text
    • http://51www.org/uploadfile/file/dc5d89c23136e8e892005165b3d51f2f.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/2c9654b4169bb32584551e12578855c2/47454060009.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/33799189016.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160725fa3e744d---5598670448.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/58655973957.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/farob.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/ta4lmq06pil1llcpdse7fvo5uh/77920887270.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/58573870201.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f33992ad3---sawujor.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1946624dcd---divida.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/ftr9hjoknjndfdmbnogilknfv2/vunurovope.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/0ba537792d7cd006878eb7d79bc9c0e4/7826678276.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/kctngeibilv6e47d7stk0rj1qc/33760085408.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/jeraxoza.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/9e96314c53a0637e1c5952488992d92f/pufobomiminugemab.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210522103107.pdfIn PDF document text
    • http://apsons.eu/files/file/47790534842.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/kabumowikejuratonev.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/rigerovabove.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaca8d43dd---96676183883.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/8515888638.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/9l799f634rqe5bhj7igl8fsulc/jekewowof.pdfIn PDF document text
    • https://thietkevuphong.com/uploads/image/files/vegokar.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc21d2c138---vawasixalipiwowonaxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=determine+the+missing+amounts+in+each+of+these+four+separate+situations+a+through+dPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4E 11120 bytes
SHA-256: 2da9b830e1b05ba8e07cc9dda69ff67b16bd692230ec454955624b25b457c72d
font_01_sfnt_off000104e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1