Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d02e7fd07d82e6…

MALICIOUS

PDF

89.9 KB Created: 2021-07-08 05:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6bb2acbfd003732ea842415b4708e1da SHA-1: bf31bd0798a6c74a7470c75c0a90b38d4cad6a9e SHA-256: 10d02e7fd07d82e688af8ce6f6d6edab34aae8980441be0ab96f21c156f616d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://medvor.ru/uplcv?utm_term=smartwork5+chemistry+answers PDF link annotation
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088b5d802a74---tokugurovokajoruzawade.pdfIn PDF document text
    • https://dineflon.com//files/60331229530.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/titijofekekidununagipijad.pdfIn PDF document text
    • http://mzr-avocats.com/buddha/ckfinder/userfiles/files/1491067663.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/dizureliluzejexa.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/8affbef0e385ce3014ce74306cb79bc3/66869210370.pdfIn PDF document text
    • http://ypcalumni.com/clients/2/24/24042806289e0d450134266962f0a0d8/File/98734423897.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/jexisetilomejitiwomutado.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/26683304049.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/48392573964.pdfIn PDF document text
    • http://gibisch.com/files/files/53870016260.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da32db13adb---56297702488.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160d6c0675e902---47424154086.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/vagitofubabejerasuromi.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6c3379c46---dubuxizimonizinujor.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/nipumupokupanusuj.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/zegoxuzij.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/8ntk897utga5f52a4dd60ivgom/63283164426.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/pm5u7kqn9dacqp0298jqstf88l/bofitemafufupirajajora.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/57654270784.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd24f35440---37195527491.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/guridebulejazix.pdfIn PDF document text
    • 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_off0000fa2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2E 10952 bytes
SHA-256: 2a45201791b9af1ad58d9ed238aadbd35daa00786a177cf1c45051697dbc33cb
font_01_sfnt_off0001137f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137F 17800 bytes
SHA-256: 70355e7e886e54a1a4225da2378e08e123c9a947db0b959c6507224a27e007e8
font_02_sfnt_off0001427e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1427E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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