Malicious PDF — malware analysis report

Static analysis result for SHA-256 2974846571840b8a…

MALICIOUS

PDF

88.0 KB Created: 2021-06-26 04:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f3442919083eec4d67282472197db0aa SHA-1: 7bc4c9585ba9d374f9ac86a9d546f2beba6e7fb1 SHA-256: 2974846571840b8aed24fc08ddb89faddeb3a0ee507c45dda9314d379a6a14e2
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, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, aiming to deceive users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/d4e0dac761d83e061a83bc3be4e38fad/34553094773.pdf In PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/68pdlmgtvlkmhibivvajajm34h/zojojemalerojisi.pdfIn PDF document text
    • http://pmmagic.vn/userfiles/file/81396040128.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/38b7f830098fe3a6ac7363c2a55def91/63004047099.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/difug.pdfIn PDF document text
    • https://dm288.com/slicice/file/zefarosofejomutu.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/53223419399.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/62c95507f1b917a4f023c81bc19da157/52490014870.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/uh4gesipjac6rlub4iqmgb7ind/74919822505.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1a5a98b75---59486954908.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/snkk0c5rjoh13uv9t6lqnlicgn/penavijetekabatadat.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/th1hv24nee3t6mjiknh3dukcfe/midikubosawido.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e37581f582---75129187752.pdfIn PDF document text
    • https://melz-feu.ru/upload/41168756988.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/g96ookeihu4kvmml2l2d2ubvu6/6432308735.pdfIn PDF document text
    • http://millecolori.it/images/file/99902525541.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/73952757180.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/66e3e91e78110fd4cd76fe396b0d129a/vumafusixavowaviwuwuro.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609095cdeaf71---kurijizenigojibesupota.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876de16585a---16792099485.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/41660be9b74c7b3a9babf1fbb3ecac0d/8585213089.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/59bc8dc725de70ba2405499aa8286f23/javerefovara.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162251145352.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+division+of+power+between+the+states+and+the+federal+governmentPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF40 17964 bytes
SHA-256: 924b6e5d7d694489f8ad69994a5cce852aef6b40c3411fb9d5ca4ac2e432fe7c
font_01_sfnt_off00011e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001368d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368D 11200 bytes
SHA-256: 3e9883d6d1ac99cdf6eb2d444822590da8aaa091554ad95660f84c4954260895

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