Malicious PDF — malware analysis report

Static analysis result for SHA-256 27eda8db6da8bdf5…

MALICIOUS

PDF

81.5 KB Created: 2021-09-20 04:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f332ddaa3e2b7ff969ff3d5539278562 SHA-1: 7941aae5a2bedbe4a374d0c8462dff1c24a138dc SHA-256: 27eda8db6da8bdf532fe12c7b0b1df9a6f890462fd318b0c01ec24f71a9ac695
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and link farms, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content indicate it is likely used as a lure to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pixomot.ru/uplcv?utm_term=3ds+emulator+dolphin PDF link annotation
    • http://agecarekorea.com/ckupload/files/91532300399.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16147e17e4ba8c---31438967374.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/50154319006.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae40483266---25438052989.pdfIn PDF document text
    • http://starfishdowney.com/uploads/files/puzugebovijotivamadafexi.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/vajepezej.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/161395f95ec0ba---rixodewawowimobagi.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/katuki.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/rawowafituj.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140aa6b7e1f8---17539599972.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/wivuwivezokawinunemiko.pdfIn PDF document text
    • https://defrokatilai.lt/images/files/popokuzodelurezipe.pdfIn PDF document text
    • https://etadelloro.it/images/file/pevuv.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/punobumekuropomox.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/rurexigizapolerago.pdfIn PDF document text
    • http://patanjali.zohukum.com/ckfinder/userfiles/files/57703277913.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/fineke.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/65113487637.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/37841752792.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_off0000d918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD918 18240 bytes
SHA-256: 953b96e9ef6bb45cf5381015f08bba72eadbeae68aca401d833bc62217626fdf
font_01_sfnt_off0001084b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12062 10832 bytes
SHA-256: 33126b14ea81808532e918fa5581a859c57105e7d2d84d65f4688e0ef630ef13