Malicious PDF — malware analysis report

Static analysis result for SHA-256 69df626ab773c604…

MALICIOUS

PDF

96.2 KB Created: 2021-08-15 05:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eae3eab806e5fddbf4e040eb15ec8115 SHA-1: 7d97e2dbc277d9e1413defc599752c82439386d3 SHA-256: 69df626ab773c604c3a512c6d60abf1bab99809632f8036b05ef26ff377131d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. Heuristics indicate the PDF contains a link farm pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The primary purpose appears to be redirecting users through these links, likely to phishing sites or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • 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://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef772717a5---sarokurufano.pdf In PDF document text
    • http://sbs-group.co/userfiles/files/19968894198.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/8861105b9ec6d9de60fdfe062a51b691/xepegibamawife.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/vqasfra059b2gj77h4urbdg8ue/30354303554.pdfIn PDF document text
    • https://mollis.rs//files/nivelipevikewitati.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa083e835b6---62100680365.pdfIn PDF document text
    • https://2acontractor.it/images/file/64796076638.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b03a9b6207a---34180612732.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/xonosof.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/fixonakeponidoxe.pdfIn PDF document text
    • http://jpmoto.biz/upload_picture/7189507923.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/osbuhs0a10fed4m2mjo1airhjf/kerewedubigapojovo.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///vebexabudomofubat.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b81d7f41a---gofakexawif.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/b57da1553df0e1063288fa8b74d5335d/wuzafudekasavopunudugijet.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/51501702325.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/57276821602.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/91144850707.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608920b4e297e---musafedixi.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094dfbee777c---jedud.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/47078994e290dde05c52a5cca5b0facc/nozabotoresuzadenawo.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609250c292442---77440050941.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077494311e78---pofogaki.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b81853db9bf---50128515921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=b%C3%A0i+t%E1%BA%ADp+ti%E1%BA%BFng+anh+l%E1%BB%9Bp+7+pdfPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/tavoloneso.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_off00010b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000123b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B1 23904 bytes
SHA-256: c7c8e9c08881fe4254361890f77cca9eb752e8a46c8c6f6d7a51ca350a19ca07
font_02_sfnt_off000157ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157EF 11176 bytes
SHA-256: 10fc68ceacff19b249f5211edfd62ffcaa8feea2bea7b2bfd99389a7918839f9

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