Malicious PDF — malware analysis report

Static analysis result for SHA-256 383c3c4e67be7a46…

MALICIOUS

PDF

105.1 KB Created: 2021-07-26 05:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5af13c4a978a26d677e9dd36f21f6c9c SHA-1: af11a5d1ee32c786a329b8bd7ccb8505028048a8 SHA-256: 383c3c4e67be7a4684e254aa638190a356d9f0d1f6d6054eaefb0a50615b5721
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host and distribute malicious files. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The embedded URLs are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946bd2a5f10---31059649697.pdf In PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088b35579834---51608043539.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f210e99c423---22774698082.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/tabiwagedegijofa.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/79b8c1011486bc8b5282104477c0ec5a/78076273561.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/54329172015.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bc66ee43d---30706583320.pdfIn PDF document text
    • http://omg.su/upload/File/kosezawo.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f680fe3bbd2---viwokibejedofewakobuzu.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/winujixufeg.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/56eabcddac7fca133e03b1848adaf065/tobimuvawemefulabiwi.pdfIn PDF document text
    • https://datawire.gr/files/files/37533810205.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/3787895b1c5caf7a8a240b4d8b30a99a/lukuruzela.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf900cc62d9---nulugelabev.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/68024845465.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5a2bf413f---5345360341.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/5lihul9n640lnf6bsgu8ghn6d8/19378132371.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/muwuxatap.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/7cad3a5a8482639bed047153aec1be69/67083034150.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090b8f561efe---65337295417.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f028b9bac.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=free+download+oxford+english+grammar+book+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00017dac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17DAC 16272 bytes
SHA-256: 5d4671d1332e890e117e8760d76ca70cefe9e63041615d1f5b80c5da97a076e1
font_00_sfnt_off00011247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11247 22504 bytes
SHA-256: e752ac2ee3a65864e907de4e46a90a6b96ca6f0e6a9416168eab374daf578fbd
font_01_sfnt_off00014bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000163f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163F0 11244 bytes
SHA-256: f193e65e179d1188980c2a3967aff31e3e7abbdc9dafc79a3652392301c55f51

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