Malicious PDF — malware analysis report

Static analysis result for SHA-256 659c2ceff43b84c1…

MALICIOUS

PDF

89.3 KB Created: 2021-06-28 20:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 71a49bf16d97bd17cc9f08bf401f66c8 SHA-1: e7c307f1274b2845c885fe8ed38bfc723eb4e493 SHA-256: 659c2ceff43b84c1f5cb1dade0f53b0e1a68dec88a74379475362b469d6c78e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely serves as a phishing or malware distribution vector. It contains numerous links, many pointing to compromised WordPress sites, which likely host further malicious content or redirect to phishing pages. The document's structure and the presence of multiple external URIs suggest an attempt to lure users to external resources, potentially for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbc60108dd---93486189229.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/boludotanigemedik.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160aa173fec397---18557535792.pdfIn PDF document text
    • https://kawanmto.com/contents//files/76215638240.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/gvqjte9qo40q34jl7r39134ou5/49531337066.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/7097e6bb5231d0b0449e8492781d3e6d/86074485715.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16098b9ff11328---46289962321.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/19422303312.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b296bd3dd---72627389976.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/1416580253.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/5556900878a5abcabe8f42e3898edaa3/20253814428.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/dejujurukugebededowo.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/7a64a202f8470320e0ba5856e65f457f/62019689914.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c880ff1e78f---sezapepizev.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0ca1d65ed---vubebusakazaliwobowigut.pdfIn PDF document text
    • https://yellowstonewildlife.com/meretofabaruti.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/u862b145t7vkfm7blb2i9s1u69/76167067526.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/xolowijojipotekutotot.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/ak08kohm3c27p47a91db761c6r/52362751675.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/76394588260.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/051bd9728e240651aa49e02a909ca4ca/zamikigijarapomedup.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/408dd0b2efe585fa7334fbcc476ad700/1316959270.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607f76096c652---panasavotevevozuno.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca1c16fad3---muzimoz.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/6fdd732065cda32ea98148c611c24692/kekolerininokapuxuto.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073697f1a411---boxakegawovegeliwufoxuf.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c60bcc0a1b6---potejejipukazu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=warm+feet+in+bed+at+nightPDF 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_off0000fccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCD 16696 bytes
SHA-256: e1642170704e4cf1b9a478056f7c5ad7a596295d165caf0b04565e5767992255
font_01_sfnt_off000127fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FE 10600 bytes
SHA-256: fecf4c018496735feb2aa98d3760a7c474c78c98dab4d2e87a74a2959a78a233
font_02_sfnt_off00013fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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