Malicious PDF — malware analysis report

Static analysis result for SHA-256 9814cd5559d648e4…

MALICIOUS

PDF

96.9 KB Created: 2021-09-03 11:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 43046dd3e8749055c25df9550546015b SHA-1: 88e6d3fe15cef49dea13865693634b21bbf7dd60 SHA-256: 9814cd5559d648e413564dd01ff936b7edc1325f090b73f6149ca9252c8020fe
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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=manual+kia+cerato+forte+2013 PDF link annotation
    • http://bezpiecznamlodosc.org/files/file/33175915036.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/fexejekus.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ba9cdb94c---92691840723.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9bbaeabce---94207330608.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/papip.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/67163584612.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/86693238597.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/12883518035.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/mawoxupuxesenomel.pdfIn PDF document text
    • https://aaaxxion.info/images/file/risazozozosix.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/6aa4c85cdc9f3d290ec11cd94ef57e51/wasamukekafofap.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/4l0ae6et09tbono1auuvjf5tjl/77623366245.pdfIn PDF document text
    • http://apsons.eu/files/file/20166144068.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/58725347381.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/kozekulikep.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d0895040a---kabezezasetigoxune.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/44834260535.pdfIn PDF document text
    • https://maftplayer.net/calisma2/files/uploads/bumokor.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/judowipuj.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a33a588b4c4---vetefakikuj.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210527_966A994FD8ECC850.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a85623845---46197885149.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5ca57cf02---vawamorutafim.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/lowadaweligiresa.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16076421a185f3---zobifisu.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_off00011335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11335 10812 bytes
SHA-256: 93448d0ac8818f7c12fd91f91a2729575b9544ad307fa4a0561f19084cce1fd8
font_01_sfnt_off00012c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C64 18460 bytes
SHA-256: 8186bdf86bf7553948679094b4d291e91cea1b066e3bee6e32fa52432f8cc010
font_02_sfnt_off00015c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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