Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0861729dbac0732…

MALICIOUS

PDF

84.4 KB Created: 2021-09-08 12:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 94f72fdee284afba589e118423719a3d SHA-1: c65800fd698422c041c954c9eccbe7b3ea68f39a SHA-256: d0861729dbac0732a8c9ea1d77567ce291abee93e65e1612a3fe1c18dfad1097
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with PDF-based lures designed to redirect users to malicious content.

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://forexinc.ca/upload/editor/file/24959577715.pdf In PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130c5ddc99c9---34180018019.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/kugaworofib.pdfIn PDF document text
    • http://vanhacollection.com/images/files/kujepovisibexubona.pdfIn PDF document text
    • http://spharma.ua/files/file/zurowusi.pdfIn PDF document text
    • http://eluvial.com/sites/all/sites/eluvial.com/files/sodonovuz.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/vifojunaxive.pdfIn PDF document text
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/93555887128.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/22188884404.pdfIn PDF document text
    • http://cauthangdep24h.com/upload/files/mowozemiba.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613676ddb5481---majutumikixuko.pdfIn PDF document text
    • http://huanghels.com/filespath/files/20210908155159.pdfIn PDF document text
    • http://xprchemical.com/upload/files/bawudasaxabavilosobekogel.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/filononinexegogobinesab.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/9519325192.pdfIn PDF document text
    • https://grouptm2.com/contents/files/jedodi.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/53983171560.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/xeviruzifagadaze.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/154ef1f2ffa6e8726c4d7017de3da8b7/tiweno.pdfIn PDF document text
    • https://krzczonowice.pl/gfx/file/41027813331.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/bosatini.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/87210985502.pdfIn PDF document text
    • http://secondhandgraphics.com/usrfiles/file/jajimibijavarabenof.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffcb383ede---53476648885.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/38727813843.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=convert+ms+word+to+pdf+converterPDF 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_off0000ddf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF608 20396 bytes
SHA-256: 097f3f52bbe3a9fa0254e1ec0527e1421b36c8c590e3f698bd8eec70357c16bc
font_02_sfnt_off000129c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C8 10664 bytes
SHA-256: 43796a1a0920ead7870797b6b46d25ba27f8279e48135bdcfc8bab978ebf08cb