Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6e2ad1d3ad48bd…

MALICIOUS

PDF

78.6 KB Created: 2021-09-08 19:34:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a197c81cd56d55fe425f9329c010f42d SHA-1: 500513f0764e4f272f09698f2bae222a6d00b9ce SHA-256: ae6e2ad1d3ad48bdcf1b3cc275847dea7bb93dff7e1375d361fca6ede2814545
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://wastran.ru/uplcv?utm_term=printable+pattern+worksheets+for+preschoolers PDF link annotation
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ce2e17abd---92789026470.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/fuwezomuf.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/zibonumugolilagobu.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/texorobadus.pdfIn PDF document text
    • http://zatuchlina.cz/upload/file/58636483413.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/wisumerupebegugitewe.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/57ebccf5d86cd8600aeb0a497c9571c8/92001732066.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/texatoratebikute.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/50776730713.pdfIn PDF document text
    • http://metabolizmusonline.hu/images/upload/file/bonukesovuwow.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/70858683031.pdfIn PDF document text
    • http://vipacademy.org/userfiles/file/zepukalisarezuzotogudol.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/fllkaelbec21ru31vdicb0bm73/87751073970.pdfIn PDF document text
    • http://kodemari.info/data/files/68355074627.pdfIn PDF document text
    • http://srcchaika.ru/files/uploads/files/82056005022.pdfIn PDF document text
    • https://krzczonowice.pl/gfx/file/70783487585.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/dokesubad.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/41ea8e9c73c6875dbdba7ef08f86b87d/45277901346.pdfIn PDF document text
    • http://lobi.md/userfiles/file/reboxeduzubosilemopozor.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/2343725616.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/67911938046.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/tejepulokoxo.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/xeniwubetotot.pdfIn PDF document text
    • 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_off0000d024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD024 10896 bytes
SHA-256: 1de2481c31767d7dd21ce9905d47a7a3a350663866fd847287d94460ad289dc3
font_01_sfnt_off0000e92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001013c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013C 16936 bytes
SHA-256: a23865e27dc3e12d4cc65f252d9c80cdf29d904a3b5a01922dda52f77a76ca93

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