Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe034bbb5a20f00…

MALICIOUS

PDF

69.4 KB Created: 2021-09-27 14:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fe7052ea178094996fcca6c6afa05a3a SHA-1: ac0e35a24663dd5c9c5092a51f98d7a8a201d9ee SHA-256: 1fe034bbb5a20f009e9314232ae421cd3faeaedc0b2a7f27af8448562ff6138f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with clickable actions pointing to external URLs. Heuristics indicate it's part of a link farm hosted on compromised websites and disposable domains, suggesting an attempt to distribute malicious content or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and URL patterns are strongly indicative of malicious intent, likely involving the exploitation of user trust via a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pistant.ru/uplcv?utm_term=how+can+i+install+apk+file+in+pc PDF link annotation
    • https://hospvetcentral.pt/site/upload/file/79385180738.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/73862901176.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/9d00de6e1c25facfe14aaf1982e45843/22862343728.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/dabobojob.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/70028837825.pdfIn PDF document text
    • https://myoffice.acqualive.com/uploads/files/58991882505.pdfIn PDF document text
    • http://h04ydivan.ru/userfiles/file/fimikokaxejupumexetol.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/72599960086.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/21be7ec74f2c9720b888f3266dda792b/jejirijavadujagori.pdfIn PDF document text
    • https://peltonfell.org.uk/ckfinder/userfiles/files/lepirew.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/4242400686.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141714219f74---79447988328.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/namurubofosepofavefusikel.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/g6vvtrt341lcp1mfblqg7ieta5/tamewemakemasoka.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/61738577302.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/gomexirikosimanajobumut.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/zatewi.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/66958552925.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20219111816511707.pdfIn PDF document text
    • https://bselink.com/userfiles/file/fobowexofununa.pdfIn PDF document text
    • https://lyonsinn.com/nbloom/fckuploads/file/723007972.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/56263847539.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/epiqta9v0iatjj55q7tt7v8u1p/39260036427.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/49867148396.pdfIn PDF document text
    • https://tsegypt.com/file/gubufexeniguj.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_off0000b46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB46D 14088 bytes
SHA-256: 313f8682dc5d9acb60e0577705580fb301e1b6ceec36ac3a64370d66ce7c5c90
font_01_sfnt_off0000d76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76B 10544 bytes
SHA-256: 9b9d45ad29d2364db14c51e801917b52d017f7594fdd87c69580e0a74d8fde3f
font_02_sfnt_off0000efa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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