Malicious PDF — malware analysis report

Static analysis result for SHA-256 036c164c10366390…

MALICIOUS

PDF

72.0 KB Created: 2021-06-17 21:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cb7102d6c6d0a0f6887144f2b63bbc61 SHA-1: 022796ef192db1b1583476deb14fc070dde104c1 SHA-256: 036c164c1036639028b9ef8e0eb3237ee5f873910cc4eeb72026b9796b190183
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 an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to appear as a legitimate document. No scripts were extracted, but the presence of numerous external links and the overall detection profile strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8963

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://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/f1075a6082cd9cb862ed9b3b9a62afbe/31222897806.pdf In PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/962da8df5625f4b5910c9478d97c3f7c/tokedumaxala.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/9k5hkrqj3qsit7qnvt8s3lgdnjgfbgfd/xisof.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c186d43f9e---77475140489.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/6211176192.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16d3c912c---xoxeripulebefuluwojujafo.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/15ed0b826d17e5205a07fd0106f01dfb/65264883072.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d295fb83fe---favugifolegowo.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/vabunaperokitamofixixa.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/gh5dshbb25gsqt4c2g8jbb7vvc/83434774107.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/jijoxinawevonefig.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/4o4f5b6ahuuj1bmd9ft78g9v20/kemawodufi.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/8fba67cf50c1797222eeea334c03add2/11212959074.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/d26936585f76e1a78edf4389fb89b9db/satevugizuvediruluf.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1db3571a1---2654095241.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/jiubi7okkb40idaud6e54tr5e5/73212986920.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=best+app+to+check+english+grammarPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 5460 bytes
SHA-256: 8a0ee0aa5be7abf3b711995e135520ea86bf7bc7c91487c4f44ea11b7212972f
font_01_sfnt_off0000fb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1B 11292 bytes
SHA-256: 0aea58916af3973c3539940d9aa6500b0940b5459d6ac2ff76ffbc5fc97d2f53

Open this report in the interactive analyzer, or submit your own file for analysis.