Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e49e8ce6ddba4c…

MALICIOUS

PDF

81.2 KB Created: 2021-06-25 21:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: db8e2a5823c940ab249b23b7d3ecbea1 SHA-1: 1064811e7e912e5fed3456c411acb5debd4d1aeb SHA-256: 98e49e8ce6ddba4c45c8f180e9096ddd624506cc33d4a32ff69682ece306100a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to redirect 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://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89527df6e---2128300492.pdf In PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aadfab87f9---97052957513.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/pevujaxob.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/pp67n5vfh66gm0jg228e4bhj7c/38091103438.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/546457333.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///notowisorogujuge.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/cnjg5jthipoatqgjia8oqhd1q3/lisofejozidireta.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/sedawisosowifamabet.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/50798877432.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/39420652488.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078dc0d077cb---vikusetorutomuxekole.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/semufuwosagam.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8098d86874d87ddeede064285346aac1/85443896143.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/17624469037.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210604132858.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/todakodokedudipoduxub.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160855f0e56d63---rijoze.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/632de746d513f60643dc8ae7b16ebbca/30059015352.pdfIn PDF document text
    • http://954move.com/clients/4890/File/20747107013.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/9f95360534356cc05f2a19de868c3c9d/binufixena.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/mowurifineberolepa.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/2797476252.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1451cc2b1---26387779901.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16096486e380e0---posumibefenabasunam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=boy+with+luv+piano+lettersPDF 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_off0000d82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82D 17568 bytes
SHA-256: abe29e12c122e906a90487d0274ea4f950cda66c9a508c68eed6a73a11bf4aed
font_01_sfnt_off000106bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BF 10768 bytes
SHA-256: ad1fffabadf6765ad42078fae73d7e5c15f602b474c94ffec61d7279138c901f
font_02_sfnt_off00011f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1