Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cefee809ba5229b…

MALICIOUS

PDF

68.3 KB Created: 2021-09-26 01:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 909d4252c6d9fb1260e7ac4967c2c045 SHA-1: f0764e92748b47130856a1d7e297530cafd308ce SHA-256: 0cefee809ba5229b633cae53393cecd86a30a0b01032e17a8afd50b5a2701f71
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. Heuristics indicate it's an image-only document with an action trigger, typical of a screenshot lure. Several URLs point to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://www.bash.cl/media/file/divasowapajitemago.pdf
    • https://rajaketiga.com/contents/files/magukisirozikaloruxux.pdf
    • https://kueapem.com/contents/files/88229439782.pdf
    • http://poliambulatorioargentina.eu/userfiles/files/lubidoga.pdf
    • http://iccarrentals.com/files/file/sagabekunufulo.pdf
    • http://thuduchouse.vn/pics/file/45743750594.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/77ab5ee856c065a7fe2b179124e1e28a/wokituximapi.pdf
    • http://secondhandgraphics.com/usrfiles/file/lezowutadarugifepopeze.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613223f22d287---66667250334.pdf
    • http://sushibelovo.ru/files/kafoja.pdf
    • http://hzbmsj.net/images/upload/File/kojorakizesutetata.pdf
    • http://eastindiaspray.com/suvra/eastindia_spray/files/91024273154.pdf
    • https://directorvincentchow.com/fck_filemanager_upload/file/bidatopemuporipifinupefud.pdf
    • https://alhasooncorp.com/Files/files/78187543861.pdf
    • https://sibservis.com/ckfinder/userfiles/files/94387689332.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/fj6l0t51nj4sb6kclnvub3dk6b/zobalololaw.pdf
    • https://lensmam.com/userfiles/file/lesojorewenaw.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/af426023013e8d895fac3e9c8d2c5544/83305160276.pdf
    • http://cnsgawefgl.netsociality.com/upload/files/5260422497.pdf
    • http://www.mostenpo.jp/userfiles/files/8600247411.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16146d0cc97a1b---raxojiwogubofobekaset.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161424d61e5139---fitusenivikupuvabura.pdf
    • http://karthikeyanjayaram.com/userfiles/file/kuvenejuxisolarifole.pdf
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25797130805.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=minecraft+browser+version
    • 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_off0000afeb.bin
34a8d52f4b77c1770776b34fdd945fdf56d4605439812ee279e19fbc8c9eb2b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFEB 10568 bytes
font_01_sfnt_off0000c84a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC84A 16792 bytes
font_02_sfnt_off0000e05c.bin
14640c3e2a6ee5ac250f2ce60a2b167d08ca038b7ab0f7c20f0621e248a4b318
pdf-font-stream PDF embedded font (sfnt) at offset 0xE05C 14144 bytes