Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c19b6571034088…

MALICIOUS

PDF

95.5 KB Created: 2021-06-29 00:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4247b3674332bce39467047f90332042 SHA-1: bd691484491111c49cc9b74fb545a6621ba38266 SHA-256: 17c19b65710340881dee23acebefdb50f1e362a3dd0ac6433029e4f7baeb8d6f
156 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 CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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
  • 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 https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c7dd79644---divapesetorotusazinu.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/9221hjes1rov6ftoumhev78tjc/nuwetatalanozitotes.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/c9043df724efeef07bf6c81c11da37d3/60676272647.pdf
    • http://qiangka.com/ckfinder/userfiles/files/lebalonetotelikawonene.pdf
    • http://adria-ex.com/images/blog//file/44997197679.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/kvmv7i5btnam8oleubetcrsev6/fotivatujerukalew.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/ubt0iqssl3934127hh1a5vssud/46816508406.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4c5fbcf6a---welitefekodudizokitowebo.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/sb8d7lkgg6kp3vo8nc57cf4576/67493936447.pdf
    • https://sce.tw/uploads/files/60c0e17dacbb0.pdf
    • https://glbtrader.com/userfiles/file/jibuwozanuwisafusawa.pdf
    • https://alshaabcoop.com/userfiles/file/futoboxeji.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef93e80176---19413679192.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/628809222e661138fb39e6f7cc184ede/mokeliboxelemafap.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6d2780a28---jigulevunaneza.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/sazatesaxupixupasup.pdf
    • http://zoncmswebsitebeheer.nl/files/editor/file/26717744241.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865b5f0af89---tizirunanosasu.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4ca08263516b413f24c9f38c2f98528d/tadujelufanab.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/f9budvuruq1r0pl0g41kb8kn07/degorefenijavudig.pdf
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c7284612765---zexomizusokomusubijifi.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/ad1b3daa5ac60708cf6c6648ff341031/1305604359.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bbf7485c0---43012305634.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/0c3go1t0l78403d4eu7qd0sp3r/wobawedojuf.pdf
    • http://zwickerfoto.hu/_user/file/32862084092.pdf
    • http://www.zywawiara.pl/pliki/fowudeto.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=distracted+driving+game
    • 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_off000111f3.bin
e4466a4d98fa99a0d03449aa4c5abccc078bab9232440a5c4f0b5b91f2ac2932		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111F3 17632 bytes
font_01_sfnt_off0001407b.bin
e15dbcc87d66eb0fcc984013cc7beb297a3727cc930aea13d79f2877ee37a2e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1407B 10612 bytes
font_02_sfnt_off00015896.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15896 16792 bytes

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