Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d06fbd9dabaaea…

MALICIOUS

PDF

75.9 KB Created: 2021-09-06 06:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0b3114a239303828ba3f12c7a061baa1 SHA-1: 5c179b71fc7bae1eaa28683f9444390234012df7 SHA-256: 05d06fbd9dabaaead914f93b43b10e0476ce3c494b59605e1d48c7d578f0be15
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that redirect to potentially compromised websites or disposable hosting. The presence of external URIs and link farms suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://archism.ru/uplcv?utm_term=nhs+lothian+infection+control+manual PDF link annotation
    • http://amdind.com/userfiles/file/58255451991.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/takunobegeterajenikulolen.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807bef505c0---75406081387.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5c5672957---64267787221.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/pemobubugisixuruga.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/b2c028f84766e39a615e1729f2070793/92656992709.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/59651118404.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/432ce4a9c514603d0c1e2dd2d99b9317/sinulojekonevibumajoxiko.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/sawoluvawogowokogejuj.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f02c2a93695---wixebuwuzufogerunaretoro.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16078026b8074a---74651951090.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/8109592399.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/95710334934.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/70300359969.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b245de40ba9---nekisulaki.pdfIn PDF document text
    • https://eurotig.ro/file/latijowiwigafav.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/b99af9a3edd926f6a75d79894b963cc4/pomiburotufusilaxuj.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b5b7c8305a257a068a0045095d9ce75e/jitanamipiv.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/nixenexokekaxumetigabu.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905862562c3---50501019108.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/nojiwazo.pdfIn PDF document text
    • http://xycrusher.com/d/files/45254595515.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9069c29e7---gukojeduwuwoxitozaruget.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/3e240212f0755734cdceed3855496a58/zibifadofukeri.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_off0000c6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000defd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFD 10676 bytes
SHA-256: a78fdd486be6577c91ce82a19c4f8f6c40257dbb6f5e7a19341eb5d18ceed17b
font_02_sfnt_off0000f746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF746 16568 bytes
SHA-256: bc087124b1772a5b174cf070baa43c7725f115383aed8f8922bcd05d57bea082

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