Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d1efdb1bbc7d77…

MALICIOUS

PDF

68.2 KB Created: 2021-09-15 06:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d0ec712855f3e2917d57aeead8a5417d SHA-1: 5e72245e85200f72f5d541d45c14925f861be8ba SHA-256: 04d1efdb1bbc7d7749c95bd661c6104c32b1e2d01e3ee5a52cac96994843305c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious sites. The document's structure and heuristics indicate it's designed to deceive users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

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 68 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://archism.ru/uplcv?utm_term=best+instagram+viewer+website PDF link annotation
    • http://infiniti.e-library.tw/uploads/files/sumejugarilajepulefefes.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/lesavibijewobazadiv.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/goelour4h83pkoc2s4a2s257f7/97761645855.pdfIn PDF document text
    • http://yongchengtech.com/uploads/files/202109012008587048.pdfIn PDF document text
    • https://qnzar.com/files/85844999735.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/lifagosemavaro.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/xebefumilunezudaxog.pdfIn PDF document text
    • http://chenruichem.com/upload/files/bamobomulixanufibu.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/rebitovos.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/xalaju.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/dirilobegaxevitumogus.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/bodusod.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/wowojutapubu.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/20760888081.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/pojaz.pdfIn PDF document text
    • http://e-district.org/userfiles/file/vifatunemunoxireb.pdfIn PDF document text
    • http://adec-interiors.net/Uploads/file/24766165058.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tuvaloj.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/gumazubapuju.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/lapufa.pdfIn PDF document text
    • http://berbun.com/user_img/file/sosarerawivuzenomub.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613eda57adc05---misera.pdfIn PDF document text
    • http://take114.kr/FileData/ckfinder/files/20210914_C3B05C194AE3C5E0.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/fulinadigikedekij.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/kitudamuzukiluxofutezut.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/2701579f6beb6e709158221596888689/rofuxipojuzab.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_off0000afe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F8 10628 bytes
SHA-256: 17a3c69ef8f47a650cd312d53c109ddc1e821bc38a4470bf241e7453a55555ba
font_02_sfnt_off0000e05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05B 13740 bytes
SHA-256: ff2e41a367818e992227c71931e6847c902086a0261cc52c1c5aad6f21fc1bad

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