Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f6451e994a8367…

MALICIOUS

PDF

69.9 KB Created: 2021-09-27 14:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: ac94cc287b6e5b893912cb3850af1b76 SHA-1: f32dffb7ba4da1bb8ffabde4ec7ff3c4caeeb499 SHA-256: 14f6451e994a8367f504aafc4dffaf9ae1ee0fd1012c8a5d8f7cfbb3ae8d30e4
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites 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 phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cructi.ru/uplcv?utm_term=how+to+watch+mulan+online PDF link annotation
    • https://cplastik.eu/data/cms/file/moduxokuv.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/17072710262.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/50989190934.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136eb0919729---vusumajexuzararumuxava.pdfIn PDF document text
    • https://pnvvr.ro/userfiles/file/95435525829.pdfIn PDF document text
    • http://boras-sjuharad.boj.se/uploads/userfiles/files/puxexi.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/foxobanovukozagepof.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/57735948855.pdfIn PDF document text
    • https://angkagenap.com/contents/files/molowisatarekod.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5c9860018---bifikijekalojod.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/bosewe.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/zawuxorelorixedifiji.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/xiziluve.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/161459b3ad5c29---58751569398.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/11344154643.pdfIn PDF document text
    • https://chungcungoaigiao.vnpec.xyz/uploads/files/4476963201.pdfIn PDF document text
    • http://apcmagon.com/userfiles/palebupupokitevired.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/75363279326.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/77943330375.pdfIn PDF document text
    • https://avela.md/userfiles/file/699486231.pdfIn PDF document text
    • http://arndt-fahrschule.de/userfiles/file/xujivenananofipofewaga.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/71121167821.pdfIn PDF document text
    • https://techlan.pl/files/file/modefilajiwukifobe.pdfIn PDF document text
    • 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_off0000af32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC749 10404 bytes
SHA-256: f3c13b69d8e6d881ec11418c8d30f398f22576d9bb747d4e309480bbac1d26d2
font_02_sfnt_off0000dea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA0 17064 bytes
SHA-256: 1c79b5ad74e37c08d4169b6fecc141ad51c9fece3ed89b7a2f2ec7ad5ffd4401