Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba6058ef47b045a…

MALICIOUS

PDF

71.8 KB Created: 2021-09-09 16:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41233b0881730f0436e049099dcc2c4d SHA-1: 029f08b706f85780cde9bf46285c1b07c22f53e9 SHA-256: 2ba6058ef47b045a05550ff9c81f148c9cfaf38456a7ad01f8f10136bfb03ae8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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=coc+hack+version+2020+unlimited+everything
    • http://trongtinpc.com/luutru/files/96716101246.pdf
    • http://theprofitnesstrainers.com/userfiles/file/28237927006.pdf
    • https://kemxoi.vn/app/webroot/files/images/pages/files/duxazapamaterebogoxi.pdf
    • http://www.naraihillgolf.com/admin/userfiles/file/96605803604.pdf
    • http://neoneofytou.com/ckfinder/userfiles/files/kuzosogikamexa.pdf
    • https://fsreloading.com/userfiles/files/mopanelevalenizuveg.pdf
    • http://another-partner.morefriendship.com/upload/files/29565349147.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c8a5a7bd7---xalitorogoxegoguxude.pdf
    • http://topas.lt/userfiles/file/medesimowikadulib.pdf
    • http://lingeriedediva.com/UploadFile/file/2021090809142773499.pdf
    • https://havilahbuilders.com/userfiles/file/92785096703.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/oo7j8cdvo7q4bhpi3gqe14683a/xaluse.pdf
    • http://ficfart.org/userfiles/file/mutalukudimaru.pdf
    • https://autonoleggioassereto.com/file/19954373874.pdf
    • https://techinnsrl.com/writable/public/userfiles/file/jadofajupezedejebujemibi.pdf
    • http://hiniceshine.com/upload/53786099045.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/ahn48icintvpcvpvsjnr64eotj/nobedafexopatotifo.pdf
    • https://i-try.tw/upfile/files/2021/09/03/45392542904.pdf
    • http://bdsps.org/slbdavbatala/userfiles/file/sekefupejegosewezutoxifug.pdf
    • http://centonze-vini.com/userfiles/files/zukenimabuvemuv.pdf
    • http://f1-rennsimulatoren.de/userfiles/file/84874088211.pdf
    • http://lex.tj/img/file/botilutuninixilev.pdf
    • http://volkshilfe-ktn.at/images/content/files/19185030632.pdf
    • https://ryokanclub.com/FileData/ckfinder/files/20210907_2B2FD3AE11907D42.pdf
    • http://naturallabs.de/userfiles/file/lusurefijumil.pdf
    • http://glovimex.com/uploads/ckfinder/files/37370276287.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_off0000b70e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB70E 16792 bytes
font_01_sfnt_off0000cf20.bin
a30e4374bec966e499253d6a0c22c5a7458d8fc6105c9a862b5a95c968591bd7
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF20 15516 bytes
font_02_sfnt_off0000f66d.bin
e9397b3715c718eb8b54e6825e89a0d34932a6259113f6a614d7039d22dcfa54
pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 11460 bytes