Malicious PDF — malware analysis report

Static analysis result for SHA-256 78973bea06f8685c…

MALICIOUS

PDF

80.5 KB Created: 2021-09-04 09:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4383a6b805a8d7dd1daa075ce86801ae SHA-1: bac576928e366660261078a4c8a3fe7a0893239a SHA-256: 78973bea06f8685c83439750abbb5087b49eacd81afe2ffec8918adcee09af27
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' button lure further supports the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://coretry.ru/uplcv?utm_term=canon+ip100+instruction+manual PDF link annotation
    • http://pamatudarbai.lt/ckfinder/userfiles/files/9026834351.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/50281772318.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/wugekilupasopolop.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202106282332552117.pdfIn PDF document text
    • https://ivanamihic.com//files/kekuvup.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609227c45b257---sazegininujasiluzufeba.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8569a364de---redibuxozepewasupijat.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/41399416182.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/3b7aef21ce13dc501c8c2f1c2438be83/vigubogiwijogo.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/38c83a9840944dd6d84c9c00553a82c8/fazolakosoxewitalegamof.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/xejororewusejafumikolupom.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/9k47ic9opp1um4la4n0g8upjg2/nudulonixeluxixurog.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/48186211478.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/kuburewixoxalusunogozoki.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/5vdbnnrvimg39av59i2re95h46/xuwonaf.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160788c7026ee6---razesimimetilodeto.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/wirutafasemisagokimigofam.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/24375146056.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/86e09a2d57d56ddf834d4fb9a2e27e48/wifola.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/buwarinetagowawujixased.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/43567536319.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/gewapozegorovidalu.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/kobivivixa.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/fawamavod.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_off0000d679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD679 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8B 16800 bytes
SHA-256: b4d7d43261e4a18ad37f44cbb69293ec2e7f362941e45733851407cd7efb2e94
font_02_sfnt_off00011a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A32 10708 bytes
SHA-256: f17739487f97b71066665855ce916046d719de1339afec25a779723c2a2e7431

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