Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd187bb7b087569…

MALICIOUS

PDF

78.4 KB Created: 2021-09-08 20:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d8648ab335991d68c09fd813206b22f7 SHA-1: ff3da57655084bd328d7bf4441899ccf9f7b2022 SHA-256: 2bd187bb7b087569132636d13af8e31f5eff94ef0880b643a198d19942da6f34
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. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution lure. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of numerous external links strongly implies an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://golfvillageonline.com/userfiles/file/bopojuxav.pdf In PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/86808567563.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/30753717688.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69751673843.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/nojemisisowugutuz.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/95580436725.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/90881021307.pdfIn PDF document text
    • https://mimpishio2.com/contents/files/27153028980.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-4/20210904011425847975.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/0904957d93849559d27dcc1c3478b8c0/vividelalat.pdfIn PDF document text
    • http://allasclub.com/campannas/file/6202221816.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/wiluwafotuxitawekituzu.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/60755991090.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/luwet.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/74448479418.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/25123675846.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/muzaseza.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/dc70c852139186263bc96b6daa8b1793/mimebolikatawe.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613268dfca943---xipasesuju.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/lisibufisa.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/97083685763.pdfIn PDF document text
    • https://www.esfa.bg/root/ckfinder/userfiles/files/jelojogenexatenoforul.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/furax.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/xawopam.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/ralomejoxujil.pdfIn PDF document text
    • http://eraldocomo.it/userfiles/files/9358815598.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=autosar+mcal+layer+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_off0000cc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC23 10780 bytes
SHA-256: a5fe7bf1a5e8c08da1b605cb87628ea423a7c670eae3b4df3434fb8afc3a21be
font_01_sfnt_off0000e51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51F 17936 bytes
SHA-256: c58c9e856791b87b59aa9cff39c08170a0ebee3bcf8f34b26f28078a56e2db90
font_02_sfnt_off000113bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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