Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e93ba092c3984c6…

MALICIOUS

PDF

87.8 KB Created: 2021-09-04 10:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: eb7ba5abb1adb61c20c097b2ef8bab06 SHA-1: 0f4f2ee6486472ee907d07e6fa1447e878ad7ed9 SHA-256: 2e93ba092c3984c690f18f2b1ee8f6e372cc3166ed213af4bd53d09600cef2dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV heuristic strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://allytemp.ru/uplcv?utm_term=bible+study+pdf+2018 PDF link annotation
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c93c89c334---67982328912.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4abad86e6---viwolosokumewa.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/27552374209.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/uanslnii582a2jranbehtikdn2/81128395186.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/5b3884eb8373f3cc4d547c852dbef80c/bokixapikalu.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/njs1rt653cqv340d5vouau0d86/zilosuvabebitokew.pdfIn PDF document text
    • http://dhs1970.com/clients/9/98/98bceae81adeaace0f0761aa7b0d12fa/File/39945936420.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c316a3c8ea4---sigojekupege.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/0c64df681ff7b788d6aa8e694955aed6/61929879475.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/10833875821.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/84201958976.pdfIn PDF document text
    • http://nutrisoilvietnam.com/upload/files/45671248769.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/pujokimeda.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/30018486566.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/49619279393.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/96699537363.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/74572428629.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/f3r3r6pe4o16jq7etpcens0511/27545666514.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/najasazobevipoxotabuzotiv.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/65390731761.pdfIn PDF document text
    • https://matraci.info/UserFiles/File/70339728082.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/8936846709.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fd7be4c82af---86304176380.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/zipove.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/ggeuoj6f8bq92arrpi655258ia/97251844383.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/segonosegekase.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_off0000f13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13B 18196 bytes
SHA-256: 7f6214bfc3742604bb611006e73ac1218a4888b06fc77a859d736d569ed7e67f
font_01_sfnt_off00012092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12092 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A9 10916 bytes
SHA-256: 33ee44bccfc5f53b9bc97d9bf325c0bf1e62ba33c9d91035e4b9304270c8a5ec

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