Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c042ccfbf50e81…

MALICIOUS

PDF

106.1 KB Created: 2021-09-17 08:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a5f89e3a0c217342c4d5478c363fd326 SHA-1: 9ecca97cfa543837a17e9f9b955ffa09318ea360 SHA-256: f2c042ccfbf50e81f0cdb576e8cdb23c31fa430c5927ef4d43ad0867dbaea22b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing attempt, likely to lure users into downloading further malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://recit-de-vie.fr/userfiles/file/59803632365.pdf In PDF document text
    • https://pierrelemagicien.com/userfiles/file/87609136623.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/lewemivafedezepebiditex.pdfIn PDF document text
    • https://aksusu.com/upload/files/49934590690.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/fuwamatipu.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/c8f2abf45d4a4d63cc1dc2c1825bde7d/50886896987.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/50648364172.pdfIn PDF document text
    • https://pisangmanis.com/contents/files/39356391199.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/vizetezamikadijunuz.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16130a9057b9bc---zabavoze.pdfIn PDF document text
    • https://arrad.ch/modules/ck/ckfinder/userfiles/files/putezivegixid.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/kerakojadiwa.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139bf82e185b---zubakabutisar.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16144123f347f6---mobopuxomagam.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/64139616036.pdfIn PDF document text
    • https://cplastik.net/data/cms/file/46493755380.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/vofisubifoser.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/pevepijumusijupigox.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/56139731626.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/pikakoferapajif.pdfIn PDF document text
    • http://hanleyresources.com/images/82537150381.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/gifawiroseni.pdfIn PDF document text
    • http://gensugroup.com/upload/files/vezivifatolitetanur.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210905_FF13DF893D1BDCDC.pdfIn PDF document text
    • http://kxxbs.com/uploadfiles/file/a/64720325860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=android+service+stops+when+app+is+closedPDF 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_off000134d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D9 10744 bytes
SHA-256: 5cc7811e7b3cc6915d39d3f9941f049ca080ac49e00786c4f1906198cbb3e3bc
font_01_sfnt_off00014d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D91 20240 bytes
SHA-256: 3cf52209bc707583f9da43916bf7deaa9d4dd238d80bdb94c71118257c8430e7
font_02_sfnt_off00018289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18289 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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