Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c37095c8ae2bc4…

MALICIOUS

PDF

97.4 KB Created: 2021-07-18 21:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 622a5c410495d023a142959b3a43b171 SHA-1: 95db0b1f2cd1ba662bfc49c84722e9cdbbfa81eb SHA-256: e1c37095c8ae2bc488ef9048568968f88a0cde5f157eee70b5a517c938d05b33
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs, many of which point to compromised WordPress upload directories. The ClamAV detection indicates this is a phishing or trojan distribution attempt. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.2392

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b8914ea13---92496937465.pdf In PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a28ec00f6c0---11822875333.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a779ea2af---95948404333.pdfIn PDF document text
    • http://csss77.com/clients/d/df/df7f2fdc42e243c7a03c192a8228c0be/File/47172524857.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/86911136603.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776602b6a9d---91219760626.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/knmciecub9nh09nlt5lga68u12/nefotadanizar.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16087428612d52---kikuxakaruzobenisozenav.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tejoteziroxiwomipomotuga.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/60824499003.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b067dc88ef1---zarozuwebidugajivabujew.pdfIn PDF document text
    • https://numberonerevolution.it/file/samexuvepezu.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/cb74ee7fe2a35e1d5c918a9422b138a8/lopavikawoloxolap.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/mndsdirbrhf0n5qap2gf5i6ari/sukojutifofidojajizigusi.pdfIn PDF document text
    • http://barnesfamilyre-union.com/clients/52050/File/lopusivogudis.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/belofev.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a404cb276a4---23683132023.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091715d4984a---22572545192.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c971e68be47---pokevekeso.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/mexuludonafino.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/dikide.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=pollution+objective+questions+and+answersPDF 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_off0001255a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255A 17384 bytes
SHA-256: 062fdf19269f59ead3cc3f9d0abf3893c9d2c2b56665232b3e1f9fa8ef572ede
font_01_sfnt_off000152e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152E1 11032 bytes
SHA-256: b9c336cbb05f90fd294fa586ea121fcdb85c5ba820866ed36a8e8a163206caaa
font_02_sfnt_off00016c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1