Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2bc5c2940849c3…

MALICIOUS

PDF

78.7 KB Created: 2021-10-08 00:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a60ef8bc3103f14efe30564d01b83719 SHA-1: 7c58f4cb3c86ba65fc2c2c8b3710359e10a89b5c SHA-256: 0d2bc5c2940849c3f8da7bb7396ce82f7ec9b6b3ac85b76b816c5548be429338
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a3a57952d---tuvejevoji.pdf In PDF document text
    • https://299-45.com/CKEdit/upload/files/vevazedipuxosege.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/digelipuvuxudujisebidatab.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/34658565679.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/bogopul.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/zikezawajenukabelugi.pdfIn PDF document text
    • http://eva.am/files/f2b09a8331172d37.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/kuxomonemaraxowirinitaf.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/laloromulilerevelo.pdfIn PDF document text
    • http://fizjoactiv.eu/Upload/file/86437308032.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/5973397706.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202109091850286826.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/55c0d158f31766deb1f61f6511f5eeac/pepovijuzopiviwob.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/78189825027.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/c62b4911e7a16a4f38f5cf7971631dea/talapeta.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/83610572726.pdfIn PDF document text
    • https://taybaite.com/userfiles/file/pujovenagalagudedufodu.pdfIn PDF document text
    • http://electric-kernbichler.at/24108009816.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/kofutipok.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/pegonugumobimizapik.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/85581590922.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/gazajadeb.pdfIn PDF document text
    • https://www.patisserie-flechais.fr/ckfinder/userfiles/files/tovorosutozogow.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/30be75d4de8e7b5985eaf4d425015697/66508341637.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/50620655888.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=sans+serif+fonts+with+personalityPDF 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_off0000cd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 18448 bytes
SHA-256: 8623b927e1ccd6d87df6455490599697059ca9fa1b6b5bb03b2af5fb9cd3dc0c
font_02_sfnt_off000114d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D9 10728 bytes
SHA-256: 16c15747e08b0f480cc24839615790c6a989e8e7abd35f4f04627ceb9b341eaa

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