Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1d5830b35b3a1a…

MALICIOUS

PDF

75.2 KB Created: 2021-03-28 16:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b97f783c3f158a78e08265cfcdb8bd0b SHA-1: 589f941b217dccd5d0620c4630c02a8e4d8571e7 SHA-256: 1e1d5830b35b3a1ab1b1e1b4c3306eedf78c950281fd1bae5d4011e56b32e534
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jumiwimov.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to educational materials, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://jumiwimov.ru/wix?keyword=section+17.1+mechanical+waves+answers
    • http://yoga-fitness.space/132654151564u2ct.pdf
    • https://static.s123-cdn-static.com/uploads/4484114/normal_5ff54862dc2ce.pdf
    • http://regse.website/balanced_and_unbalanced_forces_worksheet_answers_edhelperypg9x.pdf
    • http://santecmb-sarl.com/oxford_house_tavern_oxford_ct_064785t82f.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • https://static.s123-cdn-static.com/uploads/4374022/normal_5fee3218753b9.pdf
    • http://bitsracing.net/xidubezanezn2pu.pdf
    • https://cdn-cms.f-static.net/uploads/4427780/normal_6032f21a9fe79.pdf
    • https://static.s123-cdn-static.com/uploads/4368228/normal_5ff274dd47d03.pdf
    • https://jazewaxuk.weebly.com/uploads/1/3/4/3/134357124/e12d8c76601e.pdf
    • http://esplus.pro/linear_algebra_schaum_series_3000_solved_problems_book_downloadfuddu.pdf
    • https://cdn-cms.f-static.net/uploads/4473023/normal_6033af89f27c8.pdf
    • https://jepemanek.weebly.com/uploads/1/3/4/5/134589705/fujoridibubufav.pdf
    • https://gijesetezoludad.weebly.com/uploads/1/3/5/3/135348421/7c357d698b7513.pdf
    • http://lnstagramoriginal.com/what_is_absorption_in_plants2jirs.pdf
    • https://xixefofitajeres.weebly.com/uploads/1/3/3/9/133999179/badizalumunotofazadu.pdf
    • https://cdn-cms.f-static.net/uploads/4453103/normal_603497c4e54ed.pdf
    • https://cdn-cms.f-static.net/uploads/4465691/normal_603c3196ecc3f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/redegelesibif/sanyo_kaizen_android_smart_tv_review.pdf
    • https://s3.amazonaws.com/kelukakeb/lolupusisi.pdf
    • https://s3.amazonaws.com/patilawasu/morusazizimolawalo.pdf
    • https://s3.amazonaws.com/seriposuj/how_much_does_a_medical_lab_tech_make_an_hour.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e753.bin
91a80ab8f2ca6c2c62ed6e4b32db19c5497bd70ebb83a7c07612496f62c55c49
pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 5460 bytes
font_01_sfnt_off0000f9e3.bin
408e770a16fea4f21a83ff8a54c82df6e67de84505f0916162971951374c3d9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E3 11332 bytes