Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11eb9b1a4b10094…

MALICIOUS

PDF

95.7 KB Created: 2021-07-01 19:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7786f149da528dc9582b92417125da32 SHA-1: 501dc4a16fa1bbc9cdaa54f23faa0194d132c393 SHA-256: d11eb9b1a4b1009469092c6a09a8d0a79a73f48260026344e0959d6eedeaa96b
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely serve as a lure to redirect users to malicious content or phishing pages. The PDF structure and embedded URLs suggest an attempt to exploit user trust through a deceptive document.

Machine Learning

  • Nyx PDF Classifier clean score 0.1445

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a64bb935fb---xojubadarorovatirapakuzaj.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a66164410aa---29825215421.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160702026d8471---3033006431.pdf
    • http://nextgt.eu/uploads/file/dulabejubekexubisa.pdf
    • http://kimhoatra.vn/upload/fckimagesfile/tomovozujulutivuno.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/2bbcf8049fee4d30d4537a338e6d8ea8/dalilejamoli.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bff520c12ba---4621904423.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c922d1a315e---kegujaxoder.pdf
    • http://aep-tc.com/cache/fck_files/file/sexabodoxutaxalow.pdf
    • http://pwr-tech.ru/userfiles/file/fowabigoxavagin.pdf
    • http://erulingua.hu/uploads/content_files/files/wodakigugelivajimoramuli.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/kjmglqki26p97eedriuafs14dt/fakuwomibitoporamokinali.pdf
    • http://ats-dz.com/userfiles/file/83999878678.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/92760162a48502907f1f3082d0703ae1/27542227774.pdf
    • http://kristenpell.com/userfiles/files/kijoxovufow.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084971a2aadc---siwufategog.pdf
    • http://harchovyk.com/userfiles/file/95439123722.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/nk8p2ss0thr8277rm5tr2vubup/44621875771.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/29764ba4caffd76329c710bc21fe0d14/zifenirevakamenaturakoti.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/e6ee8c966fa0922c69e4b099e76ebf2b/13480957376.pdf
    • http://classicalgardenornaments.com/uplds/file/42508659023.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c64c3c7aad---rewetape.pdf
    • https://pet-fashion.ro/mm/file/93871699918.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e6f392c1c---kimorojeviwe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=degree+in+education
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f56.bin
3d22b9d8fd10046b422225559f49cf37feb63fcbbcd42d9c0b185be7b257338f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F56 17180 bytes
font_01_sfnt_off00014c32.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C32 16792 bytes
font_02_sfnt_off00016449.bin
6224b673e9c2bcf63a4338ab8572a415ac30ffa000cab4ce04c5e73761bbe302
pdf-font-stream PDF embedded font (sfnt) at offset 0x16449 10432 bytes