Malicious PDF — malware analysis report

Static analysis result for SHA-256 322f9f9cd62c7d0c…

MALICIOUS

PDF

82.5 KB Created: 2021-10-11 01:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5c6507c354ab325eba074a8e2d911d01 SHA-1: cddce8d9478691ba1fdcc43b3c2a2a3484f961f1 SHA-256: 322f9f9cd62c7d0c02b552b8ba2f0e67b1de6833fefc344be4b748b5dc310fc3
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://skupka54.ru/upload/m/21118409716.pdf In PDF document text
    • https://aspirans.com/files/file/55254567896.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/xujividikezosesozenezav.pdfIn PDF document text
    • https://brillimet.com/uploads/files/202110060844176423.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/86202023542.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/soxofidugoxute.pdfIn PDF document text
    • https://subarini.ro/mm/file/buwowawalurujoruri.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/novomidebumabawedagejali.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/duganinaf.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/4636679632.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16142df70d9bb2---39619819733.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/gabafozogamokogudisu.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/gdbuucftebrrj9bfgonq2cv2g1/pitixekolo.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/60859917234.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/76089149929.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16131e2432c08d---noroluwuvodenowibenixapu.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/jojusof.pdfIn PDF document text
    • https://raguvosbaldai.manovonia.lt/images/files/93569507234.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/xejexagavubusumepejumi.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/d073796851a61ee7b157b084d2ae5eb2/mamitimosug.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/c5d75fb8c54959a480991445b1d4e3ec/dikaliva.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/71660439051.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/546a55cc666f68ff48a48dcab7165880/68746045732.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=get+car+registered+in+paPDF 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_off0000dd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF596 17852 bytes
SHA-256: 6120adeceea1c7f14f991ed06a6d9f41da134ca7f626b68f17d214340075f257
font_02_sfnt_off0001245d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245D 10564 bytes
SHA-256: 079c29fcc621d3dc01fbd854754605b57370439f7e448229c44e79938f88f9b9

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