Malicious PDF — malware analysis report

Static analysis result for SHA-256 965fe949b906a10d…

MALICIOUS

PDF

82.8 KB Created: 2021-04-02 12:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f565b3aad935f694378d771009b8b8d SHA-1: 47cd423ad00a0f54ad90f42de87fb5e4ac9f3400 SHA-256: 965fe949b906a10d363f7bc7ee1aa3b89a2c0b31a74a5811f93e58ee36592710
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or phishing attempt. The embedded URL `https://resalured.ru/wix?keyword=descargar+reminder+apk` indicates a lure related to downloading an application, likely to trick users into visiting a malicious site. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=descargar+reminder+apk
    • https://betewobinolatid.weebly.com/uploads/1/3/4/7/134756009/sikedadezefaxo-tofotamejid.pdf
    • https://fuliwerupemivu.weebly.com/uploads/1/3/5/9/135983247/6339012.pdf
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/1396505.pdf
    • https://buwumesuja.weebly.com/uploads/1/3/5/3/135303403/7484561.pdf
    • http://lotibamuzuti.scienceontheweb.net/greater_anglia_route_map.pdf
    • http://jonipifenukiz.mygamesonline.org/french_alphabets_pronunciation_in_english.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mozedijiz/ximezagizemagusix.pdf
    • http://medetoti.epizy.com/mipulerirutoros.pdf
    • https://uploads.strikinglycdn.com/files/81a8735b-3b19-42d5-a723-15dd187ee80a/what_is_hadoop_yarn.pdf
    • http://kedadav.rf.gd/wezurutizemanapanetawibod.pdf
    • https://uploads.strikinglycdn.com/files/a23dc014-5c12-42aa-83be-12e28f798095/65167255314.pdf
    • https://uploads.strikinglycdn.com/files/30df60e7-8fbd-48f5-a36f-617257cdb0c2/poxiwimus.pdf
    • https://uploads.strikinglycdn.com/files/2dd409ad-01fc-4818-a4d0-179029299c79/hcm_2010_download.pdf
    • https://uploads.strikinglycdn.com/files/8adac28d-c3f4-4f83-86fa-f18c19d5db05/how_to_get_purple_splat_hair_dye_out.pdf
    • https://s3.amazonaws.com/zerepuzuze/87805330206.pdf
    • https://uploads.strikinglycdn.com/files/d24a272d-20eb-408c-bcbe-7bd28d42e16f/dutemowal.pdf
    • https://uploads.strikinglycdn.com/files/dd4de5f0-1a20-4b8a-96a1-dc5de6cf15fc/how_to_install_avital_remote_starter.pdf
    • http://kavezusi.onlinewebshop.net/daneler.pdf
    • https://uploads.strikinglycdn.com/files/742f4d49-d8df-49e6-be49-e9f413dd062a/22303537830.pdf
    • https://s3.amazonaws.com/sorapobuk/fps_bypass_pc.pdf
    • https://uploads.strikinglycdn.com/files/08c05d4d-78fa-4727-b90d-301843d64184/build_my_life_chords_christy_nockels.pdf
    • http://niselekotoz.myartsonline.com/el_aparato_reproductor_masculino.pdf
    • https://s3.amazonaws.com/jivagajamav/apercu_bold_italic_font.pdf
    • https://s3.amazonaws.com/tiluwisulepam/otterbox_ipad_mini_4_case_instructions.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef45.bin
4d97db0123e4cb150f9399a099d5b3a28ac5fc570abec4a952655c521ded3871		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 5424 bytes
font_01_sfnt_off000101ad.bin
33074ae6ab714861c7f35ac1b962a971477911c0df1883292f2186962bb3ac1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101AD 10888 bytes
font_02_sfnt_off00012701.bin
c67b92e063456ef988f2cbd1b77901a9218b9c3f1cc1011e90b95a493366add5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12701 16368 bytes

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