Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecdd8f562afe0496…

MALICIOUS

PDF

70.7 KB Created: 2021-09-25 08:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 937cd50bbc7a39bdb3933c6873094829 SHA-1: 5a753fbf05fb3e74457a07e8ac2dc4256cb132dc SHA-256: ecdd8f562afe0496204aca1e94945b7080022fa40b31543305d0b1c8b4a0ba3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm used for phishing or malware distribution. One URL, in particular, is presented as a download for a 'new version of a player', a common lure for users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://drafthe.ru/uplcv?utm_term=ld+player+new+version+2020+download+for+pc
    • https://kuraniterbiye.com/resimler/files/41877664276.pdf
    • https://asztromiskolc.hu/ckfinder/userfiles/files/netutozovogofak.pdf
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/siwilegibigimotu.pdf
    • http://wadsoda.com/UserFiles/File/92252854054.pdf
    • http://essentielles-theater.de/UserFiles/File/kemobaxidexibe.pdf
    • http://www.dgtrans.co.th/login/ckfinder/userfiles/files/65487206748.pdf
    • https://chp-travel.ir/data/file/matubojeli.pdf
    • http://csc0535.com/userfiles/file/20210917051820_0e7nxf.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613711a54f142---vinaliwoginijexunagunapi.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/c4555bc2ece3082ad53b8bece09365a9/gudidotosugubatararuwaje.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131bbc24d21e---feveroxulu.pdf
    • http://tianlanlawyer.com/filespath/files/20210909133040.pdf
    • http://soundspace.eu/Upload/file/91716351561.pdf
    • http://bipaf.org/2009_home/upload/editor/file/fefologopu.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16135d28ca33a0---24267886178.pdf
    • https://economiadecomunion.com/ckfinder/userfiles/files/fosunujepuvusi.pdf
    • http://omeofest.eu/userfiles/files/napebokikopuxu.pdf
    • http://sdes.in/uploads/44783004481.pdf
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/99186553475.pdf
    • http://utcsp.rustyramone.com/uploads/files/88041467097.pdf
    • http://styrexon.cz/userfiles/file/52821084069.pdf
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/11159641300.pdf
    • https://denizlihorozu.com/resimler/files/83542967632.pdf
    • http://massimosusto.eu/userfiles/files/74993477208.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2fb.bin
e3bde3ca080cd10b227d0a3471be9f80289045827e1da44e056750c3c7e1c2fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FB 10980 bytes
font_01_sfnt_off0000ccae.bin
4fa271532671bb6e9e111deeb939dd9a09f4b26e1c8fbc8c5249e0d0d02d3555		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAE 15824 bytes
font_02_sfnt_off0000f4c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 16792 bytes

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