Malicious PDF — malware analysis report

Static analysis result for SHA-256 018534bd214f9673…

MALICIOUS

PDF

79.6 KB Created: 2021-07-23 22:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4ccc4c14c068f8f70a48879bc9bac3c4 SHA-1: 278ae53c582cfd1a467a20cd687671177038c519 SHA-256: 018534bd214f96733157bbe08b25b22c4cb86edd03b611c0e109eadc2002d44b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/59625059482.pdf In PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b107fd74cbf---sutogakobuw.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/tolepalujadofeti.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/885iru25pm0qr7navk87el6qek/3133495008.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/84130637817.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/ce1dfc8310fc4966c2a4b512c54a008d/38902175130.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a974b7ddf---lukidekimukijobug.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077751e262d0---vuwejefekutedajel.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/gqgsucoordej09brlnc4n78a6d/wogiw.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/95189571309.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/jexuzokuxena.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/2cad9a22c690e46d3ad8af89746ff6f4/39436375646.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa77ff0940---lesusifis.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210720_44436EA4EA831B49.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/tuduvamoluvezulezifulo.pdfIn PDF document text
    • https://signika.pl/Upload/file/timebanominanobuxikuv.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/rodojarigutu.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b35fb8de08f---weregolenisinatakuduf.pdfIn PDF document text
    • http://armanetti.com/images/linavanovof.pdfIn PDF document text
    • http://russia-ex.com/loruxotuvin.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/31537657319.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c209e4b5c1c---rosemaxojadasotulowa.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/a2ea3e731002d08b84e64fb2353a3eb0/38939078519.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/kexekomokakizetokipago.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16081dd068df93---navalejuzosenodarazenilus.pdfIn PDF document text
    • http://polletnv.be/uploads/files/3640881219.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608efb3d100d7---wufedebulezidusezux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=lg+led+tv+43+inch+price+in+india+2018PDF 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_off0000d0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F5 16936 bytes
SHA-256: 8645ed09c44fe97effe554a5df2a604b94b7205aaafc41b5bdb4eb0725d11e5d
font_01_sfnt_off0000fcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11509 11280 bytes
SHA-256: cf1542c5a09cec474b6f5a43b345c56ecdc731bc4b0997d5366c7895acae8019

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