Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf6dadf02d64a8f…

MALICIOUS

PDF

89.6 KB Created: 2021-03-21 00:25:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2bdbacf94e5d6f4b44c044d8f520601 SHA-1: 2dfdc2cc44409fa4c07e0aee34bb90a5c0d74346 SHA-256: 1cf6dadf02d64a8f2a1d3f478c086d2c2958ed808ded95793eab2dbd270c39f2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate that the primary function is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/award?keyword=arundina+graminifolia+pdf
    • https://cdn.sqhk.co/xadowififux/Whhgihe/carrera_rc_mario_kart_how_to_charge.pdf
    • https://cdn-cms.f-static.net/uploads/4492900/normal_6019873cbaad3.pdf
    • https://cdn-cms.f-static.net/uploads/4458622/normal_5fd76e65c1ea0.pdf
    • https://cdn.sqhk.co/fipufose/C4ig0ja/nijogiguloze.pdf
    • https://nitaluba.weebly.com/uploads/1/3/4/3/134348735/4265357.pdf
    • https://static.s123-cdn-static.com/uploads/4366385/normal_5feb419a8c92c.pdf
    • https://static.s123-cdn-static.com/uploads/4481515/normal_5fc8c18781df4.pdf
    • https://cdn.sqhk.co/dugelabomaw/dgg2lbe/homeschool_lesson_planner_free.pdf
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/teguke.pdf
    • https://kekulepolunan.weebly.com/uploads/1/3/4/8/134889268/jimop.pdf
    • https://cdn.sqhk.co/loganidob/QgiShhc/swingman_vs_authentic_sizing.pdf
    • https://cdn.sqhk.co/wamitavixitu/5ydqKic/rank_of_a_matrix_eigenvalues.pdf
    • https://cdn.sqhk.co/gogadibavuta/jg9y8jj/plague_doctor_mask_template_ks2.pdf
    • https://nobigezikol.weebly.com/uploads/1/3/4/3/134308489/namaxuvezilufiweloba.pdf
    • https://cdn.sqhk.co/mudemodox/jhUgcib/the_return_forbidden_throne.pdf
    • https://cdn.sqhk.co/virurewev/cNggYBZ/ww2_battle_simulator_mod_apk_unlimited_money.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_1ba7e3d27bd44a1d9ddcd137f3dd4675.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0fec3eec-b100-4f3d-b88d-25fb1308d89f/kujofiterarajubogob.pdf
    • https://uploads.strikinglycdn.com/files/d125fcb6-c127-4389-8612-78c890a5a468/naming_ionic_and_covalent_compounds_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/f00485a2-7d92-41f0-9df6-a6c1f6d310d6/vawinujutilupedivuz.pdf
    • https://uploads.strikinglycdn.com/files/f0b3bfd0-9c8b-47c8-9e38-1d4a5fc057bb/nebanuwigagumujizo.pdf
    • https://uploads.strikinglycdn.com/files/737d703d-e472-470c-82b2-6308dec25d56/remington_14_inch_limb_and_trim_manual.pdf
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_c5706440a050406eaee26610c28e9fba.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe2e.bin
180a89f7bffb10a5d777b2697b5b26b245bcb84f646506a8f8d337f863af604c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2E 3256 bytes
font_01_sfnt_off000109db.bin
2e44f284d6f8a8e18ef3b1ef5e0aaf07a9bafc3394021e2bc34de331181ebcd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109DB 5172 bytes
font_02_sfnt_off00011b66.bin
06e0e20145021a48cb67fcc0b5f8db0c9c45ea555da997a52e13feb8b56bdfb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B66 10996 bytes
font_03_sfnt_off000140d4.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140D4 16204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.