Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafe29097f206933…

MALICIOUS

PDF

88.7 KB Created: 2021-07-07 09:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e8a57a852a8305525eda0766c08dc4b4 SHA-1: 2cf0fd868dd02dea3c68ff52a658f7732c9dea5b SHA-256: eafe29097f206933aed473b915d47a94a40fcfbba7ab8b0112950b2b664db440
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. ClamAV and ML classifiers strongly indicate malicious intent, specifically phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external links suggests the PDF is intended to lead users to malicious content hosted elsewhere.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=cantilever+staircase+structural+design+pdf PDF link annotation
    • https://kermoulin.com/userfiles/file/xedabebuxirik.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074243c124c4---tajizosokufebapudulimo.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/rudiwesatupajefe.pdfIn PDF document text
    • http://imi.vc/upload/files/zagupiwajowobaxozukaku.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609492b276038---87347686461.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/78102418597.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1ae3094b6---wimobemilavajifowigali.pdfIn PDF document text
    • http://etre-belle.su/images/file/bafupuwebobevelonipufole.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/jagerifunopovem.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/tupile.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/pelijetiru.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/3kvfuosmhcou507kuqjsmk23tk/jikivuzasazub.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/69386829062.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/69441112882.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77321e6af3---8143960708.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/ragojamezewevusirupito.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/josuvetakolewuxozizave.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5c1f49e26---48630400345.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/34803207374.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e15cf657be---tuxilanobu.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68d0c30565---63809908198.pdfIn PDF document text
    • http://czapla-dachy.pl/public/images/fck/file/46152365931.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/75141136568.pdfIn PDF document text
    • http://wardwrightself.com/clients/863644/File/43171983348.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_off0000f7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11015 10872 bytes
SHA-256: eda6303293fc0c6c26a2e9736e8dee80313c1cf0734f70e6a4ae7a0bb5845e3d
font_02_sfnt_off00012926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12926 16960 bytes
SHA-256: fb67964537deb25fc2dfc5602536ff08356ec1d2fe6e243f75788baa96bf2538

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