Malicious PDF — malware analysis report

Static analysis result for SHA-256 e662ac428e32d9bb…

MALICIOUS

PDF

81.9 KB Created: 2021-09-11 11:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3e6994cf57bc75bd2bebd8dbaf0757d7 SHA-1: 5a57c38906ada761335427e7217943c7510ebdb4 SHA-256: e662ac428e32d9bbf63880c4f567ee8dcf67cf73cd1a33b725c2ebf103a8b70f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of external links and the overall detection profile strongly suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://vouchertiket.com/airplane/ckeditor/uploads/files/56149814909.pdf In PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/dobugevovotulaveduzew.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/sadewuwokox.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/63198833722.pdfIn PDF document text
    • http://www.egymast-segito.hu/uploaded/fck/file/49354560536.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/21145887054.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/kananidowafukokojonu.pdfIn PDF document text
    • https://marbletreasures.com/uploads/image/files/62962017329.pdfIn PDF document text
    • http://dytac.hk/userfiles/38598251455.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/f79efc2ea89275911fc7f795761d5773/nebuxopuzoneva.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/68755887350.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/24639881840.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/32391323443.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e5f7e07e1---31157635192.pdfIn PDF document text
    • http://yuanda-boiler.com/d/files/42122393053.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/pewemabokenakemos.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/13729043512.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/67017054317.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-11/20210911121517885075.pdfIn PDF document text
    • https://estoniapools.com/contents/files/gofodorevewuz.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/34877366468.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/10941059399.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16133e2b997e23---84138972142.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/pimuxixorepizolonukubik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=amazon+rainforest+understoryPDF 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_off0000d8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C4 10724 bytes
SHA-256: 5a62960403ba45879a70b84133bc039f0cf30bbf9f07576a43069c3197e6b7d3
font_02_sfnt_off00010974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10974 18508 bytes
SHA-256: c43d35a37b0b5a29ce1976a624391ca8b46f4dcfa7759c61b4ab6b5f6db41f3c

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