Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6a201196d9128a…

MALICIOUS

PDF

78.2 KB Created: 2021-07-23 07:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 84d4a7161760f84a0115c1b56312c319 SHA-1: f7107f3d0abd50c286eec73f710af22752542fd4 SHA-256: de6a201196d9128ab85ff08c52f060521d6e51f98d05cc1b3a8d6845bb08cd4b
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, pointing to numerous URLs hosted on potentially compromised websites or disposable domains. The presence of multiple external URIs and link farm indicators strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e16172849c---zekufafutukawupa.pdf In PDF document text
    • http://fautographie.org/images/userfiles/files/14364602763.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608449840ef02---81366247086.pdfIn PDF document text
    • http://deauville.ru/files/file/41618533770.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/a1f8a18145462fe874cd35eb879a9c2e/25694598715.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/e99273b50544553727535ce56386229b/nujebiberejifudakidub.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56bd8a098d---18084834576.pdfIn PDF document text
    • https://soechi.net/userfiles/file/waruwesatirukuferejemotez.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/ef48f62d362a3b6e35d626e56ae93e3c/najagod.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/laxikadakuzerezotuxisap.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/pibekadabu.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/827q9e7ar1ncksd0viqhv8vn31/toxetanu.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/dce5301f0d38dcbb6a61a8aac3bdddcb/gugipodebumaz.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac41c36f2ea---57269818698.pdfIn PDF document text
    • http://thietbixanh.net/uploads/files/vukuv.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/57907255137.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/kutazasabo.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/2871031608.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/wokirokefokakiveta.pdfIn PDF document text
    • https://cape-electronics.com/media/file/lipasibowobozarediru.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/82334906112.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/74aea6175743dd21b60baa25501a0518/14850627774.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/77751994374.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/wojuvusexogirufuwuvuxid.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a677986d6d5---41327235362.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=english+song+i+am+a+rider+mp3+downloadPDF 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_off0000cdaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAA 10984 bytes
SHA-256: bead245846a43d38a008459a943519f1dd9c737d0a0faed5284f0bcb6ccc1331
font_01_sfnt_off0000e6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C1 16884 bytes
SHA-256: 8052b96ff4a6c5b5f9bb0400c8dc352a32050e762bdfbbcffdf359335f343917
font_02_sfnt_off000112a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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