Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58370834c46efe7…

MALICIOUS

PDF

93.5 KB Created: 2021-07-15 23:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 35211f4ffc7994bd397b48102ba027eb SHA-1: 8cea92c4f8c0b0cff4319966f7b7a5d839fda449 SHA-256: e58370834c46efe7e2c143569324cdd624ea5c93d69a13cbdec8d5179f3858dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://taxiporec.top/wp-content/plugins/super-forms/uploads/php/files/n45m6s291ia4pkuvujl0n8pc39/8436160764.pdf In PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/91235456916.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf56311c38---kakuzogamijuvavujelezakin.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/k2us8e94rn38esi9d3ojo2co84/93541027056.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/16631371340.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c4df34664ea---82339712078.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/3725579240.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/31037148255.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/a56b51b991f87ce677695f2f3a75b955/dovuvikagasebuneledatez.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/34509559066.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/1u9lip6qgarnleqfmp1mogob47/85837103299.pdfIn PDF document text
    • https://arendic.cl/files/wajifezogovexo.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be522f23e3---kasumimupi.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7ad49efac---72410216107.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/vofasepu.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/38964124039.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/lomavasotixakiwewika.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/34332448922.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/csef3khtuvegamfvl383k8djjq/bijisewopitifenujefakim.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/49e8b7ae13ced809a825068f49d3a86c/6898751325.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/jugaxapumetugixegixuguwe.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/nt0vi6arsljdikacuvmssmudc1/96568474142.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/6352574572.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=resident+evil+4+android+2020PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC18 2264 bytes
SHA-256: e08bba7f5cd594e2a50b3fcbee9bccaed40518ab2e2188aa668288333ef2e603
font_01_sfnt_off00010618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10618 10672 bytes
SHA-256: 18e2bd0b572009ea6340d9d462ea3a722b1e3c4de8ce67d3cb0b93ac0c0c7604
font_02_sfnt_off00011eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000136dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136DC 18652 bytes
SHA-256: bee2dfe9a6f040cbe3cb68622857fd7dfdc76c510684abeecf5f126c2f4111c9

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