Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba563c6624e2983c…

MALICIOUS

PDF

80.8 KB Created: 2021-09-12 04:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b40a7d95b9cd0bfb049ae89c8e90a2d8 SHA-1: 41b9f7b88fe90b7d3f988208b606cf362d6722d7 SHA-256: ba563c6624e2983c5e53cc29d209aa2e3c607f741963096bcb55e978a4d9c940
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable domains, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://evevoyance.fr/adh/.-/file/gevupuxakijimar.pdf In PDF document text
    • http://balaton.varosom.hu/userfiles/files/gapib.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/larerevixas.pdfIn PDF document text
    • https://sthouseluxury.com/upload/files/70637748835.pdfIn PDF document text
    • https://lazerom.pro/media/file/34642319675.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/8ba34aced1ccf6e4d70a99d7bbee09bc/51049200870.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/luroludamudajigujanimos.pdfIn PDF document text
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/81018715783.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/95303043657.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/tasuwigixi.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/pulavaxiwumulidefojarus.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/c82db3f12f13b0104a2a92956e6c551f/busimujumajijasanulof.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/19856888153.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/1987590344.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/wolifixirifovubomerewaj.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/96023343407.pdfIn PDF document text
    • http://otestmanager.com/club/data/userfiles/file/20210902221532.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/kogogarivobuwanalulonepo.pdfIn PDF document text
    • http://orvositudasbazis.eu/images/upload/file/kufiwuwoledokudizeleraf.pdfIn PDF document text
    • http://sxcec.org/userfiles/file/2291428479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=qr+code+scanner+screenshotPDF 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_off0000da28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA28 17260 bytes
SHA-256: 56faadcb72754c885ba088e7c7d3afbd3c0494fdaee1ba13fc0ceb3eea36e89f
font_01_sfnt_off000106d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEA 10388 bytes
SHA-256: 0a4c26688918ba4557df4de18cb147d6d4eafb572ba7952a4803d3dc3111a504

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