Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d98c15f0d47ca8…

MALICIOUS

PDF

83.5 KB Created: 2021-07-07 02:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: bd636fafc27ad9d04ccc2e7be4ae4435 SHA-1: 89c69af788197ac8be045c0199eaaab12a34af55 SHA-256: 60d98c15f0d47ca8aec7e5a790d36b9e8d38a11ebd4fe6663897467f4a5124e4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous embedded URLs that point to compromised websites, many of which appear to be WordPress installations. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://budapestpainter.hu/ckfinder/userfiles/files/toguzimudovule.pdf In PDF document text
    • http://altaprecision.com/userfiles/file/15885783232.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7f76a8e3f---xijumil.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e166df26b---juvojivonu.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6f38245a8---zejupabigoxexavulija.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/54575368711.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/34572490703.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/jadavapomedapumu.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be19782da35---83568908900.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/ahcbqvpcd080b5buc7ad0sjhlt/769617797.pdfIn PDF document text
    • http://vetcarefoundation.org/userfiles/file/ripidawetukal.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/96055630089.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/fdabb2dfc3e1fe77045dcb57e7cf3060/58239237613.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/vogomawakozaroluzo.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/0e5fd28692666a3640c1efd316532a99/zigugiduli.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe3693a19d---fakozokorawoveteket.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/16938816750.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/8srpptlm30r3pvmfho4l0pmpnt/bowugupojanigosapowuw.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/rerazupowube.pdfIn PDF document text
    • https://jagamimpi.info/contents//files/87125755903.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/xogavi.pdfIn PDF document text
    • http://bakoca.hu/files/file/zoforilelisipope.pdfIn PDF document text
    • http://kuppersbusch-center.ru/uploads/files/maxafezopuginir.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/5685ba01e7598fb4a0dba2a1fd4e7eab/dilizaxigasewanas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+draw+guns+from+fortnitePDF 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_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 10828 bytes
SHA-256: 39959c2d67daeeea36b7ebc7defa798141cadaddd32e749516f9187822071ba9
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 16576 bytes
SHA-256: 44446e37d1cbe2751ece7f0a7016224b8a0bdd8170a61e3af5c7ec2a0eb99208
font_02_sfnt_off0001285e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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