Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba0e3b82a7a8c78…

MALICIOUS

PDF

74.7 KB Created: 2021-10-01 00:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ceeadfa3bd0b7b09f587e9f980363933 SHA-1: 793f653b68651e111aed92d933373e0b4c8c3b23 SHA-256: eba0e3b82a7a8c78172ffc234f874f7b513af3f3deb307989c07a8fb16e13b47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised websites or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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://garglob.ru/uplcv?utm_term=zelda+gameboy+emulator PDF link annotation
    • http://123flower.doweb.kr/upload/files/75004911046.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/ravabagogetuzepipo.pdfIn PDF document text
    • http://only-svet.ru/upload/files/sogedafiresokoxitesof.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/e4ed13c48ede0077385224bf1ed6dc64/koduwitawiko.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/83417119075.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/xupizigikeligu.pdfIn PDF document text
    • http://tamtamphat.com/upload/files/59381609029.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/vepane.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161379cda5f2f9---62782786490.pdfIn PDF document text
    • http://elskenecologie.nl/files/32943692324.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/kujoj.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/78793535388.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/xemud.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/59139064095.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/diramefuzewodujib.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/vavivisexupeguzovudezawos.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/99711626179.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-11/images/files/99039898634.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/9666497993.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/44185025362.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1614329a8b75f6---8312398906.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f4f8269a9---59401805295.pdfIn PDF document text
    • https://norservis.cz/files/files/25832984058.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/texixakulumak.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/vibusosezejavofajoj.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/weleredurivef.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_off0000ba0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA0F 19492 bytes
SHA-256: d0b38e70f87ac2c7d98ad9e7578a5c57310bba2749580ff0913f83d4bf888b56
font_01_sfnt_off0000ecc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC2 10544 bytes
SHA-256: 48e8dd543f844cbeaa485e96fc06cb9cc46ab13ccd51c5e7adaaf5c44e565e28
font_02_sfnt_off000104a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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