Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfcf6d42f8aee8e…

MALICIOUS

PDF

79.0 KB Created: 2021-03-01 14:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 12614fe46b435b7fbebacd3d4f6328a5 SHA-1: ab85cd6441da726c5f951ea07c114883fd489225 SHA-256: cbfcf6d42f8aee8e3fdb59d2ceb0ed34f592aa61c63f7751b221aef4c30ac3f8
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or credential harvesting scheme. The document body, though heavily obfuscated, suggests a lure related to academic materials, further supporting a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://druttle.ru/wix?keyword=algebra+1+regents+january+2017+answers+jmap PDF link annotation
    • http://taxevidel.medianewsonline.com/12074896305.pdfIn PDF document text
    • http://tovarzone.ru/992755033271zymu.pdfIn PDF document text
    • http://regvoolkim.website/hiit_100sk3s72.pdfIn PDF document text
    • http://effektzhizni.ru/134483183356qln0.pdfIn PDF document text
    • http://decideyouself.fun/zolerudacheoa.pdfIn PDF document text
    • http://useporte.xyz/agence_immobilire_formationtk3kq.pdfIn PDF document text
    • http://ductsunlimitedins.com/gudamupasuwuzuponidy25ld.pdfIn PDF document text
    • http://urologo.store/disney_castle_pumpkin_carving_templatesz68he.pdfIn PDF document text
    • http://opros.xyz/blob_movie_online0bpgp.pdfIn PDF document text
    • http://orbitan.fun/vivatavetzy94h.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/nozuvimujisufarop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/sig_sauer_1911_carry_nightmare_45_acp_review.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/27238557989.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/nibivifilegovabu.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/how_the_grinch_stole_christmas_nbc_2020_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/kepogonepivowu.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/dewalt_multi_tool_sanding_sheets.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/britax_frontier_85_cover_replacement.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF583 5944 bytes
SHA-256: fdfea86d91132e329e3a6efed0d52fc1384ba868b17c796269f8ae5cf18d35c8
font_01_sfnt_off000109d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D2 10736 bytes
SHA-256: 3abe0818720e42ca1917945183020d3728216f24d20f0e39d0cc6ec99c5df210

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