Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f17abe418e49a5…

MALICIOUS

PDF

215.8 KB Created: 2021-06-18 23:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6fdfe0df9c3b7b33f0c5e62110f47eee SHA-1: 4327e10bc247a32a70557a0c3f86a554daa1dbae SHA-256: a0f17abe418e49a511beb65ccbfdf4e0a4d87f2cfb7672ef47c5942dcbcaffb4
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, many of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the presence of numerous external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7657

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/1e23fa69a97eb0a89f5bf16ab8519578/zakebegogimavedufe.pdf In PDF document text
    • https://24emk.ru/ckfinder/userfiles/files/4552657962.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/42634533393.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/vobotarudaxesar.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdd2925604---wadij.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160741fd5a13ec---wetuvuduzenoruduwaripo.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/42692541268.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/9c9a11ec0a251daba9a7fd4a6a8501e0/62839802396.pdfIn PDF document text
    • https://highrise.pl/file/kuruxesowanopire.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/36504038045.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/fe4e3bab612eb397a2150355f08b429b/jidumawu.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160affd9ce1a25---51162600856.pdfIn PDF document text
    • https://bczenekar.hu/files/file/8973637859.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/zezoguson.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c46f4416f7---xofulupifegelikukiwul.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0a0018514---73515177611.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=holy+quran+juz+30+pdfPDF 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
    • http://scripts.sil.org/OFLIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.orgIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off0002fdef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FDEF 27956 bytes
SHA-256: 63c956dcde23a73356c62c1997b6425e18daab4a90f16c79bd566f2d363a446a
font_00_sfnt_off0002675f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2675F 5012 bytes
SHA-256: 94dc83dda9847b34e9fe910f5763f633d00d7b403bfaff15c4f95dd4c15d9dc4
font_01_sfnt_off000278d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x278D3 5480 bytes
SHA-256: e777edd8bdf8b92ad179f2712dee1f373cac4127a4c4bf9d2f9c8707b40331e0
font_02_sfnt_off00028b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28B95 6176 bytes
SHA-256: 00d6d3277222c1d8cac8cf075744bd8da62484ee127e8974cabd692eafa75578
font_03_sfnt_off0002a1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1B9 9664 bytes
SHA-256: 6816d9e3afa5a7fc6fba1d6ce1b8e97bec7f438ad0dd58cb47d45ec9e8e61784
font_04_sfnt_off0002bcce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BCCE 25072 bytes
SHA-256: 7ec14ede29e2962f5c7871e0af361d179648c3259c74b9314d8bcb2efad1799f
font_06_sfnt_off00033036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33036 4612 bytes
SHA-256: 707c5fde2f5ac44701fe014eb4fb6ba95615fc7c1603d1815e6d1306655770b9
font_07_sfnt_off00033f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F0B 6356 bytes
SHA-256: 19cde0c3972c4b1da71e6eb8ce31a96d9b39a94aae2212b908f51445fb5e4437

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