Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ede7292fac48d4…

MALICIOUS

PDF

70.6 KB Created: 2021-09-17 17:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 985cea987f9d859f45bc87ff5489920e SHA-1: 64050adec673219594d96cbceab1ce63cca20bde SHA-256: 07ede7292fac48d40cd2170a88390f63927ec30fadec0c7278a17db7662fd75c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on compromised or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6646

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=lg+g4+android+version PDF link annotation
    • https://learningsolution.ca/userfiles/files/51137219027.pdfIn PDF document text
    • https://tivirtual.com/userfiles/file/bipejavuxezosawa.pdfIn PDF document text
    • http://khojedu.net/userfiles/file/livewafefo.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/44970758482.pdfIn PDF document text
    • https://tutorlookup.com/ckeditor/ckfinder/userfiles/files/91225475348.pdfIn PDF document text
    • http://skncn.com/u/files/vitulidabim.pdfIn PDF document text
    • https://stauber.lt/images/files/43865267363.pdfIn PDF document text
    • http://partnercable.hu/files/14314135208.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/domavuzalevax.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/pusukexexile.pdfIn PDF document text
    • http://baove24h.org/upload/files/gesuvubigegar.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bdce01408---taniwipozifovesizugivim.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/0ae1da639912e6603a8b99f0a089fc2e/89148001100.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/pejurotoso.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/rofapovanukajazasobotiki.pdfIn PDF document text
    • http://taociren.com/upload/file/210909192126044293rikt5gy6mvi5.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/rikizujopu.pdfIn PDF document text
    • https://alariel.be/userfiles/file/gapixusobikufe.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/61258319192.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/d41b802ab4312b631b3e307bcc48b69a/5577769093.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-14/20210914152232221408.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/30761431313.pdfIn PDF document text
    • http://magdrywall.com/project-new/christianbook/upload_images/file/kamenapujamud.pdfIn PDF document text
    • 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_off0000af76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF76 17388 bytes
SHA-256: c6b7f4a43bff7a1dc156739f1308d645ceda4608bce270d39af9a710fe55edd0
font_01_sfnt_off0000db8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8D 16368 bytes
SHA-256: 861ffeb428ca094850acd537f84b482313c4a57a85f5a5cb17cd245c1127cf54
font_02_sfnt_off0000f20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 10380 bytes
SHA-256: ce336c5124b78ef62cc60fced700623bee106e3ab9cae44a465b48fc74edc5d0

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