Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d12a474dbd536e…

MALICIOUS

PDF

80.0 KB Created: 2021-09-17 02:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9fb246f724b2314ed40e6a3a301c7ca7 SHA-1: 6d72f5cc3b46e0f63a890a67615efdcc5067b4b7 SHA-256: 06d12a474dbd536ef4c6ec89f4c1721c94b7989eb427c0c9662a835c900990ca
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised CMS upload storage, suggesting an attempt to lure users to malicious sites. The presence of multiple external URIs and link farm heuristics indicates a deliberate effort to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ft2u204u2sqclska95uj98h1em/selexidafoniwepowajiwizo.pdf In PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/52251842170.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/gedaxagipuxesimifikegito.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/zabapapimukuvunibiwa.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/8372545243.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613072df115b6---pelezezelozujoluxulugupo.pdfIn PDF document text
    • http://checopharma.com/upload/files/kopaparokamiwoveme.pdfIn PDF document text
    • https://greenboo.vn/uploads/files/79385510664.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/lvor2fdbhqtqg0jbi36u6he65b/moboxu.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/xexegerajevi.pdfIn PDF document text
    • https://jocafoto.com/fotos/file/91669369638.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/woxaguxupono.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/lifotataziwapusupojorovix.pdfIn PDF document text
    • http://fxmeat.com/upload/file/9f6778243d2aadd0da74f61b6483d7c7.pdfIn PDF document text
    • http://rileyillustration.com/images/agency/files/pobikagim.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d39d4b20aa---35308105915.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/vivofawezivubepexudajeti.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161410d9b20bc2---2802173605.pdfIn PDF document text
    • https://greenways.at/userfiles/file/podaxuxofivaxiwedunobedal.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161425b0610bde---zaxotowukiromejemupog.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/bifilidopufowuvevaju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=sat+math+past+papers+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_off0000d71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF31 16908 bytes
SHA-256: 84e13e83e32d5b1a5fb6b6128676b8bee1a8ccbdacd732a2a08194bca1564bea
font_02_sfnt_off00011aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACA 10476 bytes
SHA-256: 24b36ef6ae9cf1f7362944b6eaec2ba49323e3eb9abe2844b9d8e474546e6d9f

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