Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e60c844b8bc1b56…

MALICIOUS

PDF

74.4 KB Created: 2021-10-10 00:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5afd219ae1166047aeff99b4855b2f56 SHA-1: b98cd6288dd33106c8e398c08e23143521d7d8a1 SHA-256: 7e60c844b8bc1b56f0bf7ad17c63b03f427af9d5e78f54a1e2500a1210af2804
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple external URLs, many of which are hosted on potentially compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to distribute further malware or phishing content. No scripts were extracted, but the structure suggests a lure to download malicious files.

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://hebakotb.net/userfiles/file/8229667078.pdf In PDF document text
    • http://tubelessons.net/cms_images/file/24162727180.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/dejarevigika.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161413a2fb0119---ruwimibebarupigesokorakim.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161526f941a47b---muwiw.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/mafedelinerus.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/45853420580.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/jorivuzirusabaripakila.pdfIn PDF document text
    • http://kanalizace.instalace-charvat.cz/userfiles/file/90711263369.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/sinexinuninefojupux.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/51291239632.pdfIn PDF document text
    • http://tageedesign.com/ssmpt/documents/file/kofomibukokus.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/73860429146.pdfIn PDF document text
    • https://tssch.in/tssch/application/admin/uploads/file/28851238467.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210925102155.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/3acf3fb925e96368a9757684884f4e25/20434999487.pdfIn PDF document text
    • https://berettyobne.hu/userfiles/file/25610057232.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/negegigunaxejukememibef.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/jerigifas.pdfIn PDF document text
    • http://dobermanncz.eu/files/daxosel.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/c7069734590458e5803d55888e7b85b7/ginuluvuzomupajigelo.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/visebexesaparo.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc074a9a15---sekovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=wren+and+martin+answer+key+pdf+free+downloadPDF 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_off0000c020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC020 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD832 16544 bytes
SHA-256: 3a22b68f88500c3abefc366298e4e450393b7245c4b3cab6bacda28ce6946e4a
font_02_sfnt_off000102ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AC 10944 bytes
SHA-256: 5293bf0063f0b5f71a3efc12138d6a29d35531fc1b6b98e8a71221b9ccb0e8f0

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