Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd0fbe429c1d760…

MALICIOUS

PDF

76.9 KB Created: 2021-09-03 05:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 50ba03bd38b7bd70c23a3e5ce1bfcb09 SHA-1: 672a4f67056d4ea2ac857b72f398d6c8c9e59efc SHA-256: 9bd0fbe429c1d760ab0bf4581cc8f83a28be26f930dc71e65989dcdd93d2e480
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to compromised CMS upload directories, suggesting it's designed to redirect users to malicious content or downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the link farm structure is a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://jtour.vn/userfiles/file/89634492136.pdf In PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/bbf2ab93f37386dd4205553c64c771f4/19020236929.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/62315618506.pdfIn PDF document text
    • http://gojjang.com/uploads/files/67787929898.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608f266663d05---68505831654.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/wofidibo.pdfIn PDF document text
    • http://www.ddu-hk.cz/ckfinder/userfiles/files/jezanizewivimarur.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3e44ff5aae44d11c5272599b6392daf4/kojojawibavavekezedanez.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/bbdad56b18e03aba645151464d54a194/76352329588.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c921e2058f---48877741716.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/86195222503.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/85451088115.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/tujizilewamirigada.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/88145479707.pdfIn PDF document text
    • http://cy2hand.com/userfiles/gijopemudef.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/ff9c94942469217604a35cd017630785/bunuvetijulozixazipat.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/53690421836.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ad02f6bd69c---bamebavawafexipubogaz.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/fudevusugoz.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a457df8c97f---24327782430.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0c0e16ca6---57138186865.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/71662750540.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/23076042293.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/faruno.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/naxotuvibegerorixu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=2005+dodge+stratus+sxt+owners+manualPDF 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_off0000c977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC977 16376 bytes
SHA-256: 01de80bcfa041afc08f8ef9dec2b9e96e480f7081e35656ffd30affc1d5fba18
font_01_sfnt_off0000f3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0B 11064 bytes
SHA-256: 911538894b047ecca45898249fc1f057d2b4ed747e10d31eea28d47edcacafa6

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