Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ed7f988a6a3fc9…

MALICIOUS

PDF

94.2 KB Created: 2021-09-05 09:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0bcd513e9033e872aa59676d289099ba SHA-1: 598b3eb884e008de10a1a6fb2379ed7c38a38b44 SHA-256: d0ed7f988a6a3fc932404ddbac2f8986c4b196c90073f8b163655ca9ed630f5e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous embedded URLs that point to various websites, some of which are hosted on compromised CMS uploads or appear to be on disposable hosting. The primary purpose seems to be directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://mytopics.it/uploads/file/47943291599.pdf In PDF document text
    • https://aarhuskortet.dk/images/file/87993360054.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca53526d65---xomezusajumovow.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/85320425288.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/62195977992.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1a8aaf596---9193739267.pdfIn PDF document text
    • http://miltonhigh65.com/clients/874455/File/wigobido.pdfIn PDF document text
    • https://photojet.net/userfiles/file/ziwagud.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/565f5a6ctnbl3qjphqcc8nshb3/81178027744.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/27965958898.pdfIn PDF document text
    • http://parkettes.org/clients/b/b3/b30d687fb0e6fb0c44210170e51784d9/File/40841455167.pdfIn PDF document text
    • http://odumakus.com/uploads/files/17882261669.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/tonupuvowepebu.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/68312218484.pdfIn PDF document text
    • http://myarrahnu.com/mo_images/files/lipiv.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/vukosejobibeke.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fa9b8aa9014---nimozo.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/37355652025.pdfIn PDF document text
    • http://chipgene.com/image/files/20210814_194335.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/161270954b7330---45773401514.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160813309ebce2---32258598977.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/tewunidavatum.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/vofosufifixizazekiwaledu.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/38323407254.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=plantilla+manual+de+usuario+pdfPDF 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_off00010543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10543 20836 bytes
SHA-256: b9f30b912bd2fdd873713a7e88c637c372208d2619c5294f1b8ae113d3e33486
font_01_sfnt_off00013a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001525c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1525C 10760 bytes
SHA-256: 410612eb740fe2937145ab9cbe275456536c23777106b320bbf72a65782c466d

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