Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f2a21485f69cc0f…

MALICIOUS

PDF

88.5 KB Created: 2021-01-06 21:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2e3eb4ec04070245de9687eba69fd8a3 SHA-1: e954f88155a74eeca27538c1f39dd73b8b057e2f SHA-256: 4f2a21485f69cc0fa23f95db98f7b3668ffd513a477fc0948647e13776b0b442
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/aws?utm_term=madhura+raja+full+collection+report In PDF document text
    • https://gazolono.weebly.com/uploads/1/3/4/7/134721713/rovalib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403808/normal_5fcd0e83df506.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427529/normal_5fc6694e6dc8f.pdfIn PDF document text
    • https://batigagonu.weebly.com/uploads/1/3/4/7/134774980/kugabodikuwol-xunawodakefir-riwux.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/7119677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450733/normal_5fbf67792e67e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://s3.amazonaws.com/sazomo/lexegibumowenaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97f9686-cec2-4d7d-8d2e-e8fc890afa41/xubujupo.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/datixujifagulitulezigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23d4a5be-3d80-491c-ad2e-2390c1777e53/sherlock_holmes_kzl_soruturma.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/wokomejaxobadoder.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/honda_cx650e_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/cytology_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/ancient_history_of_india_books_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/tatenejax.pdfIn 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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54F 5144 bytes
SHA-256: eada8ccd8eb229932d048526933187174206886294ae904198a7e33cd679f82a
font_01_sfnt_off0000f6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D5 6596 bytes
SHA-256: d1260d564ea8484c65fe940626b97ef79910d7c011f9e59ad7f7bf2da30c6de2
font_02_sfnt_off00010e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E26 1936 bytes
SHA-256: 7420db9ec41012b263dff8e0d039d2a895961a6b4c1647eabbcd20f441fad98a
font_03_sfnt_off0001176d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176D 11472 bytes
SHA-256: c079096e8c338706d902ac4b4e3685b9756ca190447c8428a5fae01d316b0af0
font_04_sfnt_off00013e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7F 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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