Malicious PDF — malware analysis report

Static analysis result for SHA-256 6722949cf5302d8e…

MALICIOUS

PDF

92.0 KB Created: 2021-07-26 01:34:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f46426a994982ca7bf87b69a38bd6f8 SHA-1: 059e2b7284529c39b0d2d8fb00c87a670c8874e1 SHA-256: 6722949cf5302d8eddd4bfc1e4b07226bac83daab670f41b8e90b6e47f7c18b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm for SEO manipulation or to distribute further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://tourpon.kr/FileData/ckfinder/files/20210721_E8C6FB759ADBEF09.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a3684957f1a---45843026259.pdf
    • http://aqs-group.it/userfiles/files/fewiketaxo.pdf
    • http://aaaexpressac.com/userfiles/file/vujotegimonovikulixasuxiz.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b479557e2a9---38628739147.pdf
    • https://hzautomatisering.nl/userfiles/file/59481962222.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/bg67pet72d2q9gmfouiusub3nj/13643660047.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a43848869---kaxetixufi.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/506ro1e4mhvu21cs7ga847ose0/wedarozulu.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16070e9e431695---15696098535.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783e5acf7ee---78064847066.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2540fdb502---38886325794.pdf
    • http://rakkhunnursinghome.com/user_img/files/99744694657.pdf
    • http://eraldocomo.it/userfiles/files/boxokexesonunubugusiduv.pdf
    • http://vinaaquachem.com/uploads/files/97200128182.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/47d5dae7ba8eb4c503bd8643a1e84f0b/33785490785.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084b09075ab3---gekepanawusofamigolarem.pdf
    • http://bkmarine.net/ckfinder/userfiles/files/1625484233.pdf
    • https://sasalidayanisma.org/uploads/file/79469811947.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4a92b83b5---54346237274.pdf
    • https://cleartunemonitors.com/ckfinder/userfiles/files/97319617993.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/129f8b3410f8d21f9e251d680931c444/27238368507.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df99b54dafd---sifeto.pdf
    • http://reanda.com/jingkelun/userfiles/files/20210530111627.pdf
    • http://keyflounge.nl/userfiles/file/24074423765.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/6q4ggiabn5o4r7tupqna4m2nq4/zukudewigobobexafur.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16071d93b8091e---kofasigo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=pubg+song+download+mp3+free+download+dj+tamil
    • 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_off000100df.bin
2e54def1c1910fef8183d7bf3acaee94b211c9dbe9e56f69e37b8ab400768bd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x100DF 11472 bytes
font_01_sfnt_off00011b96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B96 16792 bytes
font_02_sfnt_off000133a8.bin
167670a99de75a27ec4c0ff3fd8cfc8b1c7809e79286a2db59cbc68b395cd9ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x133A8 17424 bytes