Malicious PDF — malware analysis report

Static analysis result for SHA-256 65de17141da5549e…

MALICIOUS

PDF

82.9 KB Created: 2021-09-01 04:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4fb7a434e4320a0d2bd528b76c66c3eb SHA-1: 4479ed130fea9b81bd62396a3ea726b8eec2ba51 SHA-256: 65de17141da5549e260098531c023eef17f784138d1630a5de29c39691ddb294
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple URLs hosted on compromised WordPress sites. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/i3uoi8oe967kelhlp0bloq3rku/dixixawuzif.pdf In PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/xizivixotavolufugobexejaz.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/defoberenipadalu.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161059c0ca158a---lenejorisafewelukolenik.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/09c1kqs4mvqcf1bv612dldgqg2/gitewurowum.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/tatujiwaribuliwibabux.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a4f8cfdda---tebufibivojuwerugojuwujuj.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/27145347369.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/kiredejipavenikap.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/18163023869.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/52162184240.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/23025018364.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/91552475710.pdfIn PDF document text
    • https://maintogelonline2.com/contents//files/61547888028.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/96175861316.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/nularonipikol.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/kiwemevopavudonamovibewu.pdfIn PDF document text
    • http://steinemann-ag.ru/sudamorilaxono.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/wovifajexakozikonalepidi.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/cd58af6fb81d7d2769ecbc1e5f69647e/tutirexegixudumex.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/xawojagikigola.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/89248210619.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/vuvkbjt6tmk7mljqhh3ol8tvu5/suzizafolok.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac80eb67fd3---jufidiwibo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=it%27s+a+matter+of+timePDF 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_off0000de0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0E 10208 bytes
SHA-256: a91f1bd53f002ede68b0532b2898e73bd320942a414f503bb8736d7b5d50e4e9
font_01_sfnt_off0000f508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF508 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1A 18676 bytes
SHA-256: de5992d67ae2eeb13f6a47ec454405118481c509b135c43104df9260597fd1b5