Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6b28ff0550d453…

MALICIOUS

PDF

78.1 KB Created: 2021-09-02 05:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 304cb3a459a59865f84a27bc4af3043c SHA-1: 45f89727b19178b0b232f3cef8bc3f7cd48e00ef SHA-256: 9e6b28ff0550d453cff261d1277b609cacc1650ad98b43c7541457987b4da7a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other hosting platforms. These links likely lead to further malicious content, such as phishing pages or additional malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

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.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/7necj3ktmclg2u75ovu1furtbv/jorulapeg.pdf In PDF document text
    • https://isleo.com/i_photos/file/78595595353.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160da03f4bad1a---nuboj.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/jelagumuxabufofavulisaf.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/3bffe8cf459828226ea4bd10f32f3d8d/69741512826.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/20616572745.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/35298772356.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/h88on4um4qtjh445mctu0f0954/18267400405.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202108281137498523.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f87735380d9f67e76ad5c8273a2c3611/rinimubemetexujuwa.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/31667089968.pdfIn PDF document text
    • http://hotelstrack.com/bot/ckfinder/uf/files/xififupivitorepi.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/puwuvilamig.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/10538760937.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee87855ee2---68461180177.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094bde413a63---tabimobulunotoworelafa.pdfIn PDF document text
    • http://fwullong.com/upfiles/editor/files/80885866318.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/xokuzadivegozobidik.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/kisakopijilixoj.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c62a7d7b33f---kalilusujemapukos.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/96765186.pdfIn PDF document text
    • https://retta-bg.com/userfiles/petorexepiwawibinuxa.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/22982476773.pdfIn PDF document text
    • http://butterfly-propertymanagement.com/userfiles/file/39860867946.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=example+of+deductive+reasoning+in+psychologyPDF 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_off0000d9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C6 17116 bytes
SHA-256: 579fe82dda1b574c474c3b0042c26120cfbb4a0f7213b2b3bdfafa76ee828926
font_01_sfnt_off00010621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10621 11432 bytes
SHA-256: 624dda4a7c68c42f2692b2926f9f20d3d3d72c13547546ef267eb35ecbb6ad60
font_02_sfnt_off000120c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1