Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed417dddc57f5bf9…

MALICIOUS

PDF

103.9 KB Created: 2021-06-28 10:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3a51069a82b8ea602bfb44c99cf3be06 SHA-1: cd622b260280433c38ec390a150544bcca90fee0 SHA-256: ed417dddc57f5bf90b7df012289e7334b7e467ca2ac3791820bf067e20289c59
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=clever+pdf+watermark PDF link annotation
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/6a36782703c2ee1360691147450b5e70/kogevomepasato.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/eet300ishbc9pkceqmb3r6g5nq/19208876399.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/24833127381.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/gujewufokexanewesitenopar.pdfIn PDF document text
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/fvjc4398e0m50fncvai7cc45a0/75930675534.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/b623cd7969fd18ae7b70a56670d79cf3/wipafikajiwivufefonu.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/rivonesanuliwixaguge.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608160ea3eb90---gukozabage.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a1b4b6883b6---zajugaku.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/55173527727.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/14372450770.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875e144124e---jaguvapu.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160cbcba41b166---gufediketova.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/635437ce3bef8ad0adaa45b1a08178a5/vidikigobonebutujav.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/e58ab61bf46f3ba734198fb8563658ea/73411391708.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/zasadelesigavu.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/27129414868.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3ce2ba44a---15428905610.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/iqk5au5qtui8v1cdl791ggg5j7/63864380782.pdfIn PDF document text
    • http://scro.ru/pic/file/29966684530.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e93f5e226---xalivinupotigukevesawe.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/86689832030.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/ladopigiledixusasulixine.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/d78a96fd3d0bc23bf1165770d64ebffa/58851136368.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E0 17104 bytes
SHA-256: d85329cdfb381ccf7e01da6c28b5456c2ce5dca2ea73d73f7cb76d2d5068f3e9
font_02_sfnt_off00011ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECB 33788 bytes
SHA-256: 5924b2990b5427a005bb68f67b1a75b832970cf5f4db4130bf3f812876ac965b
font_03_sfnt_off00017a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A31 10448 bytes
SHA-256: f9ff2241e453c416210ac75a51f754757c2e9529a6584d7e91633375c08df435

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