Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c09e8cfcb5cc65…

MALICIOUS

PDF

83.0 KB Created: 2021-09-13 18:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f05570d66ea9f7af609477e45ee9c60a SHA-1: 9a85a9d1c45959235640028ae7ff440846dbfb2c SHA-256: 75c09e8cfcb5cc65487a3e0a76eeb06d5593da1a97de435ebe4096a4d0d5d9b1
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b5c7689b7---zizonoran.pdf In PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/a6840f47b2efd4dcbb418962f85ebaed/54929839606.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/mabipexemiv.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/zijugazakomivudebumelila.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/e0983a06534d6a2f9c30da2b18b3e623/zimulerojafirabarexilexo.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/zukotabufufitaz.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30050290853.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87522386268.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/78989492613.pdfIn PDF document text
    • http://clingac.com/d/files/7234392746.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161305d8377bc7---88291455725.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/45362162313.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/75626841941.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/xasilupumunenewomitevabe.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/4502101660.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/19026395682.pdfIn PDF document text
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/kisogumerero.pdfIn PDF document text
    • http://www.poliklinika-hb.cz/userfiles/file/bemukiruwinopozax.pdfIn PDF document text
    • https://dukupahit.com/contents/files/63237117083.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161333d1d637b4---47752867194.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/34269651400.pdfIn PDF document text
    • http://chemtron-vostok.ru/media/file/towonofawedokolefej.pdfIn PDF document text
    • http://methese.com/upload/files/94891229486.pdfIn PDF document text
    • https://skopjemuzikon.pmgrecordings.com/ckfinder/userfiles/files/bevikobuburaraxunew.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af67e0044b---giluzap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+know+who+stalks+my+instagram+profilePDF link annotation
    • 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_off0000dd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD17 11088 bytes
SHA-256: c9fe46ed9627e1ac8c9c08b474886f91aa235670dd3f041be676971b32d0d664
font_01_sfnt_off0000f6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE2 18564 bytes
SHA-256: 6d7a5919c911fe8fdbe244716af0dc280859b84e7e2c2dc03db31104206314ef