Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbc2ddf9566ef2a…

MALICIOUS

PDF

74.8 KB Created: 2021-06-12 13:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e47ba0d295d65c9372f8f96de7c922ce SHA-1: ca378839d2a8be7611f0eb7fe359716bf19b31d2 SHA-256: 2bbc2ddf9566ef2ab0ebf8ff7bbde5e66bbd2dc9cdef57b7eb2d8d2f95ea67e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised WordPress installations. The embedded URLs suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9818

Heuristics 5

  • 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
  • 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://catamma.ru/uplcv?utm_term=strike+force+heroes+extraction+unblocked PDF link annotation
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2278bca6d---vovoxeritapo.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/wuwomilamisarakodoziz.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/fiwana.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/upi75j47227fdhn2c4f85jfbf9/beludasodotejowodusu.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2v81o3l6vljs7beu837u9lgr1k/92386952295.pdfIn PDF document text
    • http://www.kilincsweb.hu/fileok/file/litaf.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17a519ffe5---wotiduza.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/6cb70952420551ba357a17e709d8f851/2709756575.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/dc537f26e1cd2e694aba3255f8ae632c/87515835679.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/89ca3bfc27a6dc58863b7949b4749f76/poguzutusojoxofanosaken.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d8d1da1026e8bc6e4cea93b921afcbf7/ginisamiluw.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725e6768f51---13302436566.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/6eb3600c07af446f488bdc31e9a64061/visegokubelixo.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/u8u0kuk3u2qlh9nbqhsb7r1ur5/baxaminoketaminaxol.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/kupetaxelezevogemo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDC 5368 bytes
SHA-256: b09ecfbb1ee87514c1e0881fddff2c96f5566bf7e410ce6b320d81ae0d491dae
font_01_sfnt_off0000ff08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF08 15524 bytes
SHA-256: 776c1a40145fe3ee7ffdedb30e68413f078a77632073be912b56da4032f16838

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