Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ac3172bc1dc6be…

MALICIOUS

PDF

80.5 KB Created: 2021-09-04 05:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c19f009881faa2583822453b69c4596f SHA-1: 6e062d1fb898a469765cdacdcab8c83f21b302a6 SHA-256: e2ac3172bc1dc6be9523e0d40dbb24f2d90f937269e58583203ca99a3412bed5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm pointing to compromised WordPress uploads and other disposable hosting. The document body is heavily obfuscated, but the presence of numerous URLs suggests a phishing or scam attempt to redirect users to malicious content. No scripts were extracted, limiting the analysis of specific execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ks-puyuma.com/CKEdit/upload/files/40649029908.pdf In PDF document text
    • https://distriparkbotlek.nl/userfiles/files/68889741306.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/31706381687.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/pamitukoposekuxugodivamu.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/76129365142.pdfIn PDF document text
    • https://cape-electronics.com/media/file/56714529633.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/porusamozamav.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/83780030059.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/ja90vusg0vqnfhklmbt0t8db9o/benagutoxiwekozazanub.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d8e8a113d---nixatavomobe.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/cv2bdlr0bsfgpd5tjuip5s7npp/45071369792.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/d0a54da11dd257d0bb8a6a8446142064/mexaf.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a71e61b28a6---2642947861.pdfIn PDF document text
    • https://steammining.com/userfiles/file/74512413462.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/59657856888.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084cc2ece2d0---11207000182.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/36968927131.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/49791937670.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/mirexexapigunigix.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/ruxamu.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/60721739932.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/fopijadazegejos.pdfIn PDF document text
    • http://minhphucvietnam.com/uploads/userfiles/file/wogejomikixobapa.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/tezomijaxikevuduwawe.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109031554228158.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/44c766942a1be6fb88b3e5710f54db33/1678666523.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=group+1+previous+question+papers+with+answers+pdfPDF 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_off0000d514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD514 17412 bytes
SHA-256: 9cabbe1ac78fbf52b83486ae7149356f948b8781035144c0c9f4f3ff3eaf5174
font_01_sfnt_off0001025c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025C 11040 bytes
SHA-256: 2c643a0f0a42af488f6e8b4c973f72f855d75a062cdff025fc87da752a2aaa42
font_02_sfnt_off00011beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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