Malicious PDF — malware analysis report

Static analysis result for SHA-256 2208897b8a0782f9…

MALICIOUS

PDF

96.4 KB Created: 2021-06-28 13:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9716ad91fd294d42cc96366475af78a1 SHA-1: 2a9e4917d5694a0b281f8226ef4075549b6f4373 SHA-256: 2208897b8a0782f9d12a1342d22d93369e374b12d8368f936ca7176df7fb81e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, characteristic of a link farm used to distribute malware or conduct phishing. The presence of external URIs and link farms suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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 http://beerskiboot.com/img/upload/file/5993852754.pdf In PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aea4f162629---99426095315.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/2c9fe787b9e32bc3a3e8ba2a8268012d/dafopipajopijijebapojo.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f83821ab35ac64f31d5b118a3511f812/80525443598.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/sunovavigikorilaxavek.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/ropezulimokigejeli.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecb41edd16---wadegasudorezisiwaxodeba.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc63d6a337---mepam.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5d6f780b0---vanejevesinu.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/nagowevasagu.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/mapuzalexulixovusefufe.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/4ec73e505982177fa08ebc62ab56afec/pagigawuzezotoxik.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/f1ba6b66bdc76233662b8da0d4ffc95c/79706226908.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/49f7kardut7dh8g31bkrnj3j5d/31105019626.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/4f9096cb6b2277f8644826fc7e020d07/82672208352.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/27788624406.pdfIn PDF document text
    • http://abpaluso.com/upload/file/ribaxemosaxenili.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7630c89c9---wujudawa.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607f114987136---zolexo.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/dobemodafivejifiso.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/pivilo.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2261a28ac2---38585253987.pdfIn PDF document text
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/72803184574.pdfIn PDF document text
    • http://haai.org/upload/file/46085697776.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/70751270064.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16099c9774653e---vumudamarufufe.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84796659613.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=place+to+space+migrating+to+ebusiness+models+pdfPDF 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_off000112ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AE 18044 bytes
SHA-256: 25ab366b9bf4fe72863b967f86c32fd546267fce7bda7d0f1c1e709a771552b7
font_01_sfnt_off0001418d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1418D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000159a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159A4 11204 bytes
SHA-256: 1a2bacf2579d3cfe19d1959c30a5af4898f9b1e30446d8ca77654df49773f1e1