Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb44e53a2fa47d0…

MALICIOUS

PDF

91.6 KB Created: 2021-06-26 01:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 84e83aac7ceebea2c375e29413df2eb8 SHA-1: 31fbb6a67a27b55b6729ee7cb09de1b8b5ac05cd SHA-256: dbb44e53a2fa47d0d40f4abdd0ccd4a588376e910b01c54090f9e2a1faf96d9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://geriatriccarenewjersey.com/userfiles/files/bodulu.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079636bb1656---71988605106.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160c687d50c332---wanelenuxisopematon.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/fezofepuw.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c69e0009632---71158170813.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/35361463270.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/88794016734.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9eccb4ba8---17606575660.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/74239296954.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/dolovomurob.pdfIn PDF document text
    • https://autoparkalbanese.it/file/pujoxijitegigun.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/xidetarap.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608530afba371---82310893676.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/85118288981.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e8b3bf5140104568c9635be6c0d5d724/biduzurakigoriziwo.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/bca07eb7c780fcdc5fe8e5c40125314d/30900150591.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/90ad05b5b98fc3477739b4e997ed84c8/52688113924.pdfIn PDF document text
    • http://zatacorp.com/upload/files/90266873692.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/76945776820.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/34bf154334cfa5ecf1ff6521a86002c5/99592275600.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210619200220.pdfIn PDF document text
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/1e0310a3fee9c85e9a19cbf7ab539826/solubiv.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/e84ea73d88c9f40b18088c599b50ed4d/tusiw.pdfIn PDF document text
    • https://nasikampung.info/contents//files/77329138934.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=product+marketing+strategyPDF 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_off000103b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B7 10976 bytes
SHA-256: 75b9df77257195bef7647643dfdc35ce3e8287640365a53ae156c2eccc294177
font_01_sfnt_off00011d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001351f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351F 16360 bytes
SHA-256: c90ea017b568638e7785672b6c69260f94b897607a09b7f07b4c09c1e653984e

Open this report in the interactive analyzer, or submit your own file for analysis.