Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e2ac26a35ca6c5…

MALICIOUS

PDF

74.2 KB Created: 2021-03-18 10:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c886684cb20be79fe2edb8abd11cfb4 SHA-1: eb7206a760f1451e6ecd565d77550943fe1d1e94 SHA-256: 64e2ac26a35ca6c52586f6fffc818e6993e4a6508c0bfe45e341b23df3d1c299
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious URL, which is likely a phishing lure. ClamAV detection and ML classification strongly indicate malicious intent. The PDF structure and embedded content suggest it's designed to trick users into visiting the external URL for potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=vocab+level+g+unit+2+answers
    • https://cdn-cms.f-static.net/uploads/4420600/normal_6031eb096c967.pdf
    • https://cdn-cms.f-static.net/uploads/4491159/normal_5fd672458c3df.pdf
    • http://matras-24.ru/define_programmed_learning_in_hrm4xpwy.pdf
    • http://sokegex.mywebcommunity.org/active_listening_building_skills_for_understanding.pdf
    • http://dotixomovi.sportsontheweb.net/gisadegof.pdf
    • https://cdn-cms.f-static.net/uploads/4382960/normal_60327d233bf90.pdf
    • http://how2clever.com/32281393841ew2gj.pdf
    • https://cdn-cms.f-static.net/uploads/4393911/normal_60232e382379e.pdf
    • http://liwexun.mywebcommunity.org/how_do_i_make_adjusting_journal_entries_in_quickbooks_online.pdf
    • https://cdn-cms.f-static.net/uploads/4425933/normal_60137c2394e03.pdf
    • https://static.s123-cdn-static.com/uploads/4448337/normal_60044c38e0dd4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_0949ffcbc3ff46e9bfea868ae65e186b.pdf?index=true
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_38427ce045fe49acb3aa7a3ddc4239cf.pdf?index=true
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_aba1d0c594e547349164103805e2645a.pdf?index=true
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_5a2f093d784e42629e100104328db922.pdf?index=true
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_031dc32dc9194835afa5fc3e63fd5f1a.pdf?index=true
    • https://6f46ab72-b8e3-4ec2-8f01-cb5d6491dab7.filesusr.com/ugd/9a120b_34f67f6ece394aa898eb103ee87e913b.pdf?index=true
    • http://tavoxelelenasi.onlinewebshop.net/afterglow_ps4_wireless_headset_pl-051-004r.pdf
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_f6b6d35a87784655a4659f01fe0c29dd.pdf?index=true
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_7ee01a768901407f85fb5c8b966e4dc6.pdf?index=true
    • https://0ccb9a81-bd3c-41bd-bc79-2352350f0e5e.filesusr.com/ugd/95ea6b_1e38ec02909043bda12effb14119a90a.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6fa.bin
77619a4484dde3ed2692c3a5bd8d53043a119afd93b2692069842aff025184c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 5356 bytes
font_01_sfnt_off0000f95e.bin
f9dab604a79f4c63049a47457124d6c0c0939f53d207fdacac39eda6debe45d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF95E 10032 bytes

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