Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9a94e9caea2f2b…

MALICIOUS

PDF

81.4 KB Created: 2021-09-16 21:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 14c8618bdc0247d36a31971aa654d6f2 SHA-1: 9875ef883ec25975a7563b64ab7e12c35110d697 SHA-256: cd9a94e9caea2f2bdac6349b9e15e5b411aad3fed4d131baa7ac7b51ff43d9ec
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the nature of the URLs and the PDF structure align with common techniques for distributing malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://oniceh.ru/uplcv?utm_term=data+counter+widget+pro+apk PDF link annotation
    • http://image.dlib.vn/libedu/news/bachviet/20210915/file/63142832334.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/64356863294.pdfIn PDF document text
    • http://ministryofrum.com/memlogos/file/kodoniker.pdfIn PDF document text
    • https://kuepancong.com/contents/files/98480064625.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/54209208217.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/daa5e27659a774d431009647996d0fa0/33360875327.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/ruxepekax.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613891d79f25c---70581737305.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///mafugudifosetopafexilene.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/enhjljc0om9jts5sklrj1j1jr4/sinobep.pdfIn PDF document text
    • http://siciny.eu/userfiles/file/luneniladiwozulo.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/nipezuxofiguziwekizepaji.pdfIn PDF document text
    • http://cissi.it/userfiles/files/bivazodo.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/jodasiga.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/dolotose.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210901/files/20210901211709.pdfIn PDF document text
    • http://zuche0551.com/upload/file/wilatu.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32214922333.pdfIn PDF document text
    • http://greenglobepms.com/uploads/93970139018.pdfIn PDF document text
    • http://fu-xin.tw/uploads/files/202109090936111003.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/25119290434.pdfIn PDF document text
    • http://minhanh.com/files/92884564678.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/podabisaruzutuvojorikabo.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/2507971347.pdfIn PDF document text
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/64157469071.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_off0000d717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD717 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2E 10752 bytes
SHA-256: 94729aa330497fa007fab358e22df755f58495cc051a9a784feb742f1bd62db9
font_02_sfnt_off000107e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E3 18404 bytes
SHA-256: 0da869b494d48456c873d3593b2edbaa850f55e8a4b674f9ed18d2af26b96d6f

Open this report in the interactive analyzer, or submit your own file for analysis.