Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4d25ca963b07df…

MALICIOUS

PDF

76.3 KB Created: 2021-03-13 20:58:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0434b71df18296b1e692502ccdf2eb1c SHA-1: 775007c988cfa1cbe04f1e13abaa27f51c2f324f SHA-256: 6b4d25ca963b07df3ecf5f371c49ceaf19139952ae02cf54d802f1a4a44c9df2
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. The PDF contains an embedded URI pointing to 'https://vilenefex.ru/wix?keyword=protists+and+fungi', suggesting it is used to redirect users to a potentially malicious website. The document body appears to be malformed or obfuscated, but the presence of the external URI is a strong indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/wix?keyword=protists+and+fungi
    • https://cdn.sqhk.co/rukokota/bghivjg/craigslist_nh_apartments.pdf
    • https://cdn-cms.f-static.net/uploads/4379049/normal_5fd89c922023a.pdf
    • https://cdn.sqhk.co/jobiwokojo/Lghgeic/13653208707.pdf
    • https://cdn.sqhk.co/mapelimujeku/jekHhct/lokigixalepukebutaxut.pdf
    • https://cdn.sqhk.co/pigevikuwi/dOijgid/61225922961.pdf
    • https://cdn.sqhk.co/zogameva/gevFkjg/4_pics_1_word_level_1832_answer.pdf
    • http://dodemul.mygamesonline.org/fiasco_how_to_play.pdf
    • https://static.s123-cdn-static.com/uploads/4409614/normal_5ff20e87f1a9f.pdf
    • https://cdn.sqhk.co/bedipidis/cahgKAx/kendall_and_kylie_fight_full_episode.pdf
    • https://cdn.sqhk.co/vakolitakap/ejjFjhX/red_ball_4_60_level.pdf
    • https://cdn.sqhk.co/gobajejuz/hesMhig/pizaxa.pdf
    • https://cdn-cms.f-static.net/uploads/4409123/normal_60244472b80eb.pdf
    • http://vazagitomis.mypressonline.com/gafiwa.pdf
    • http://figopevevalid.iblogger.org/lototevorasatesolu.pdf
    • http://javaxirivibewi.mygamesonline.org/business_management_books_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xifimerin.onlinewebshop.net/31180029365.pdf
    • https://s3.amazonaws.com/panalipolifod/six_ideas_that_shaped_physics_unit_n.pdf
    • https://s3.amazonaws.com/kibavutibeved/74436239326.pdf
    • http://jagazuzigi.epizy.com/mikizivaxapogorukoru.pdf
    • https://s3.amazonaws.com/tarizirefevifab/nigagajodexaperixos.pdf
    • http://rovututuxopi.epizy.com/8th_grade_math_games.pdf
    • https://s3.amazonaws.com/tokit/boonie_bears_tamil_full_movie.pdf
    • http://sejofinudagiji.epizy.com/34817316895.pdf
    • https://s3.amazonaws.com/mokixetat/66500055420.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_off0000ee6e.bin
58d01ee368d3a9610ace0ca70fa33311892ae7ee09f8cae43e484b38bdf9c143
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6E 5044 bytes
font_01_sfnt_off0000ffa9.bin
f8ee61850a2f3f00dd28a2eee53e787fa9df7b73bd35b6421721cd1e3b2b4839
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA9 10572 bytes