Malicious PDF — malware analysis report

Static analysis result for SHA-256 0272f7eb8a117542…

MALICIOUS

PDF

70.4 KB Created: 2021-09-08 19:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: eb1aa68b1237ea3e59239553b6b6467b SHA-1: 71474cd289272520b72d6fc614208761dc321891 SHA-256: 0272f7eb8a1175421a395c17251b1c6dfba31928bda7d9f8e096af5a91ae8e64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://allytemp.ru/uplcv?utm_term=maariful+quran+bangla+pdf+islamic+foundation PDF link annotation
    • https://dazhonghua1688.com/ckfinder/userfiles/files/lexorenorowulo.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/56657651212.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/57376916781.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/nilofuwibip.pdfIn PDF document text
    • http://shinaval.ru/userfiles/file/59232502617.pdfIn PDF document text
    • http://haai.org/upload/file/jetapopidedaxogedobap.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/niteguxuwubesososagovegif.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/setaxagolakiwigulabinu.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22469467060.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/40369949199.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fed4d9f521---jogebevano.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/sipunebajafaruvotul.pdfIn PDF document text
    • http://adveotec.com/img/file/kejenatexisuga.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/90681656280.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612eed83c28e8---73635097372.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/mawifipogibawa.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/64185427971.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/a3729f59f6ab78f468dfbe7de1d065bf/8241840367.pdfIn PDF document text
    • http://salkim.com/userfiles/file/40984669140.pdfIn PDF document text
    • http://manegedebuitenwijck.nl/uploads/file/zabediluxibexi.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369e7faf49a---95147886780.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/xidiwupukamufenew.pdfIn PDF document text
    • http://uteambio.com/upload/files/ruvoramof.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/5359071582.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_off0000b28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB28D 15072 bytes
SHA-256: aecde48099aa1f75db1cd6f615a2e3a75c59d2170a5abcafdad13287b71cbe47
font_01_sfnt_off0000d81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81E 11212 bytes
SHA-256: f52d030ac869c6168de3b27d99512b2f40c0e5041a9517db56c01bde13754fb4
font_02_sfnt_off0000f19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1