Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff70147702ac1282…

MALICIOUS

PDF

81.2 KB Created: 2021-09-06 20:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ba3d6a4a26e4f48b5ff8de52a6c0914d SHA-1: 57e901813619194b8f89a0668c143127843a9dc4 SHA-256: ff70147702ac1282b405336cf44a2ce2eb7948d36ee4126c78cf0e068f3d482b
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely intended to lure users to malicious content or further stages of an attack. The presence of a download button lure further supports a phishing or social engineering context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b67bc2a84a---81667580953.pdf In PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/ee393ab42229ab5948da24061a6ee286/46761488335.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/davedekulotubijorenotexob.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/71939735196.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20a567f438---vofoko.pdfIn PDF document text
    • https://strechybenesov.cz/content/xasuburu.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/79913002290.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/scun3045aji5e6q5bo00cdcq5u/nafuxutilusi.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b1e76bab7---soxivakebafuwu.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/41628625707.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/48498309976.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/bipixumatore.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085a931b6e8c---10692053397.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/mabirividunilijimu.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/18872705234.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/58634604584.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/s1riko29bgmga1eas0l900eclf/13229335136.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/nezavepazisumotikigobu.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/bubezumamutusinole.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=park+preventive+and+social+medicine+pdf+free+downloadPDF 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_off0000d6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A9 11028 bytes
SHA-256: b948c295f11a359884cdb99bae0db824c0ab120220b0c1d5746d24d36799daf3
font_01_sfnt_off0000f05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001086d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086D 18040 bytes
SHA-256: 0471c28f3bf3959497be2a2ea52d7d8f4098261159fc35a05d0389152ee707f4

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