Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72db53756ac5c54…

MALICIOUS

PDF

75.4 KB Created: 2021-06-21 17:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 45bfee7a943d16eaac7978ed6406d896 SHA-1: dab01339d3d034c25af1e959fe232dc49492ac87 SHA-256: d72db53756ac5c544cbde99477b41ac65a51261d5dba82ec83bdf094e30475a8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malware. The document body, though heavily obfuscated, contains references to movie downloads, a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=the+conjuring+2+telugu+full+movie+download PDF link annotation
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/444222a5c034d6bf36f16fa1b4992bd9/jogifi.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/of749llkn0llqlvpubkpnii99f/baxovi.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/xomisefujogodudenodorole.pdfIn PDF document text
    • http://rld-carbon.ru/file/26673398619.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/75640275477.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076fb31a7559---65774855246.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/pifoputemepabiw.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/77967340680.pdfIn PDF document text
    • http://cfacgroupe.com/uploads/FCK_files/file/lasoxikuvunusawadugo.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/afb33ff048bb58e22532217a78bca906/68363530824.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/21816623039.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c8b8c084e---gutewidow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE950 5564 bytes
SHA-256: bc1dab8c6b8e76b6e89e8dc0a14ed19b20c956a1834893b0afdf739f5124de17
font_01_sfnt_off0000fc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2E 10808 bytes
SHA-256: 277e2a270a5792f2244c6e98770f6c7f5f6fa05338cc347c48b44a582b849a58

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