Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb47057735cc5e2…

MALICIOUS

PDF

80.9 KB Created: 2021-09-13 14:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aff70104cc5812ff945faf39e27fd634 SHA-1: db4c56707d28d25b13448667c86f389607cbcd4f SHA-256: aeb47057735cc5e2a51f0cc64e17ae148614a4b57d8573a95266873922c11e09
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://comptables-publics.fr/userfiles/file/7845103535.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cdcb283c49---dizuka.pdf
    • http://kronikarp.pl/ckfinder/userfiles/files/kepabowisodesifaraf.pdf
    • http://elverum-revmatiker.no/images/file/busuzobe.pdf
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210906061429.pdf
    • https://gaadalagi.com/contents/files/lesotetewirewu.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613798d05b65b---28267463768.pdf
    • https://dongcohonda.com/userfiles/file/3154390008.pdf
    • https://xn--z4qq44i.tw/upload/actfiles/gidajusinavexuduxisebase.pdf
    • http://tubietelbar.hu/uploadfile/2531497429.pdf
    • http://yds-wcv.jp/free_images/files/molikufise.pdf
    • http://ibarugi.com/fckeditor/userfiles/file/48762059281.pdf
    • http://gardatrans.com/content/Files/pojujetopukujowi.pdf
    • https://coffotea.com/uploads/files/202109030958588507.pdf
    • http://quantri.thaisonpalacehotel.com/upload/files/88979296851.pdf
    • http://bodemveenweiden.nl/bodem-veenweiden-img/dinebudizate.pdf
    • http://cbcom.fr/ressource/site-image/files/firisuto.pdf
    • https://claudiodituri.it/uploads/sutunoxelepododajutu.pdf
    • https://dom4m.by/userfiles/files/99019228423.pdf
    • http://akgwealthplanner.com/crm/files/82116424788.pdf
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/dakolu.pdf
    • http://banlinhkienlaptop.com/userfiles/file/67496761257.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/757aa556224a2c7761480496dc86f19c/49322867065.pdf
    • https://automatisme-portail-bordazzi.fr/userfiles/fichiers/kevapol.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=mod+creator+for+minecraft+pe
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d059.bin
b86a2c086dabcdc81499e29f9d01738bba68ecd443cedd4cb31334303e638347
pdf-font-stream PDF embedded font (sfnt) at offset 0xD059 10560 bytes
font_01_sfnt_off0000e85f.bin
88227a6e0af3b6406186b44db7f277ad2f61e7ea152b36a7e87dde11ebd59f7a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE85F 19952 bytes
font_02_sfnt_off00011c5d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5D 16792 bytes