Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0068f54ab38634…

MALICIOUS

PDF

80.7 KB Created: 2021-09-04 07:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: db9d39989bc81f0a0d9506d01c5bfc74 SHA-1: e85d8c3dc9632f73dd19800e0c06738e6a1ce6e3 SHA-256: ad0068f54ab38634f7651e0721e19e12c525fc25d9f6d82eb746b8711f62f0d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URLs are indicative of a phishing campaign, likely attempting to trick users into downloading further malware or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/5315bi8gj5fgho3t1o5haoijua/kebitaxezi.pdf In PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/52e938d1d78f38498116b021c939b6e9/pameponivutetodapaxofe.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/ledejexozefe.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/bozemenebev.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210521005809.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/66748086846.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/141e9e043830ed128ed5332237d09fe0/31853605231.pdfIn PDF document text
    • http://happy-travel089.com/CKEdit/upload/files/70930086555.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/noruwes.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/rixilap.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/negazumuwukezuxuf.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607611e8ee207---genivibat.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/5d8f09f4aa93705deed15815582fa999/daruwe.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f8a796de2bde9615180bdce820a0d2cc/97056713466.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c154dbe0a41---giriliboguku.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/parapuxufozanolesofagi.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/89097770430.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/nexinijeri.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f532e17bb1---gewefuwabibopugire.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/b7d62beb04f8886628fda3613af4034f/xogesidefixine.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/linaparaja.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092276335d1b---41634595348.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076a79e1ad79---luvuxosiku.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b6748529b---42385596031.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=sepedi+dictionary+download+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000d33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33F 18676 bytes
SHA-256: 63e681e481743f7451ec7af57e1dce7c62f8c8fa186116388f95b914eeec1825
font_01_sfnt_off00010404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10404 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1B 10720 bytes
SHA-256: 656507eba0562bc4632acadf3862225a55ea07453adc6b406a2cb6343409d39d

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