Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabfdca3ebee6cce…

MALICIOUS

PDF

86.9 KB Created: 2021-09-15 11:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2f6abc4532c967106d25609e623dc9dd SHA-1: 462c41d0961effb88f72c8d7e3a57a8d769024ae SHA-256: fabfdca3ebee6cce77022aece3f3e194ea70be406d63c242041bbd3dd535ea41
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is used as a lure, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pixomot.ru/uplcv?utm_term=watch+fast+five+123movies PDF link annotation
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137493f71a38---kuzulepavuvava.pdfIn PDF document text
    • http://lapmaymn.samdigroup.vn/app/webroot/upload/files/wegiwewevivukifaboxetoj.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/faterogejidaremobu.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/12261531362.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/74395099336.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/5737183e278eb968064ec7ec302c9115/9217320647.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/31032502134.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/sugulerik.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/giligilafojipil.pdfIn PDF document text
    • https://netcsemege.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/14802025894.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/zedevuvajesun.pdfIn PDF document text
    • http://b40555.handyfriendship.com/upload/files/87492229007.pdfIn PDF document text
    • http://355353.ru/userfiles/file/xijejikoxukufinadis.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/93873768217.pdfIn PDF document text
    • http://linklandhotels.com/upfile/editor/files/86693430002.pdfIn PDF document text
    • http://taaltoetsvo.nl/userfiles/file/40773975533.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613523126d823---51142452949.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/e70d1873a40d8dbfdb3068a988146c1c/vojonenidonidugusowuzij.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17330471952.pdfIn PDF document text
    • http://lokalizacja-gps.pl/userfiles/file/75146253119.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/70195a7bae9760cd6fd0a4b5bb5a5dbd/zudanuvotufazopawop.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a76f4e50e0---91242706337.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/7cff59d1c4010a9100058dfe2741ecfc/fadokizixojiwipodipifup.pdfIn PDF document text
    • 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_off0000ed5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5F 10752 bytes
SHA-256: 3fbab53571013537835f246628e143fda3526a66c2a4273ac8570ad6001d1536
font_01_sfnt_off00010659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10659 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6B 18688 bytes
SHA-256: 752997c5634f922cfac05b75a9e778f8c6d4d1b60c19fbbdc2700f842d407145

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