Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f629d4728e72b5d…

MALICIOUS

PDF

76.2 KB Created: 2021-09-24 05:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 04f2902227f836585512e108ae720f9a SHA-1: c1d98b2c42b2e8a7fae64c3eebd59df1d867a1b7 SHA-256: 2f629d4728e72b5d8a11ceb191207c94b5f38bdb6b6c5e56735c140a49eb9078
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress uploads and other disposable hosting. The primary purpose appears to be directing users to external, potentially malicious content, consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://zoltysnieg.pl/pliki_wyswig/files/gunamurarajekovu.pdf In PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/550115e45bd6d1bcb9a7f725d7e710c5/forug.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/nomarovigakivegisu.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/xarepesitigovifor.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/24490796042.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/60348238952.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/sukifojoforitop.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/7ae39d81a4787732e115edf8287a5b79/jalew.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16143b48585950---tupuxelafij.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613864a0e6c03---fimipexumowafijufotiro.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/68625095435b5e309e42bf19237437f3/jewizivudewozosevilo.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/sewipidifuwizinikeluru.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/vofiselaze.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/niwavozejanamumekixaluv.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/givotisado.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/7438065689.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/13617240649.pdfIn PDF document text
    • http://tprcindia.com/ckeditor/ckfinder/userfiles/files/88188681412.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/poposi.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/xifawamejuganodewabat.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/35662295120.pdfIn PDF document text
    • http://axwelindia.com/uploads/62171836469.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/zodeza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=dua+of+motherPDF link annotation
    • 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_off0000bff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80F 10172 bytes
SHA-256: 0f69bfd1c3404cd2c96874a042dd87098c067af3e05f27e9d2595300a03fd163
font_02_sfnt_off0000eed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED2 20156 bytes
SHA-256: b9cad6147beb923247402e3eeb10072320ef9d64a53344e1199f401ab079f1c9

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