Malicious PDF — malware analysis report

Static analysis result for SHA-256 7134eba00d9fbdc9…

MALICIOUS

PDF

82.3 KB Created: 2021-04-29 00:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: be8e0aaa10cd0f81ef6ccb3b38c15958 SHA-1: 8be239e9e91ed8fbb46866b53672695b72360520 SHA-256: 7134eba00d9fbdc96325f2b7deacd4f8bf8f65b6d965cc8177bd58e38ed1e31d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though truncated and obfuscated, suggests a lure related to educational materials to entice downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gimoguvi.ru/strik?utm_term=daily+reading+comprehension+grade+4+pdf+download PDF link annotation
    • https://cdn.sqhk.co/jawutuwek/dhdg7ja/52539168939.pdfIn PDF document text
    • https://cdn.sqhk.co/gowozepugax/ILibhcs/32740648462.pdfIn PDF document text
    • https://cdn.sqhk.co/kofosenolo/yic2hcp/jifavejusonuxafa.pdfIn PDF document text
    • http://mukosejak.iblogger.org/kokarejamaxotatenowojuw.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/gcAhaJH/500385410.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuwaxisiw/bijhjji/43217475224.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/yjdzicz/zadabakukebux.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/ihxN1ic/kizajelalugitupuvoxu.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/bhfHdjg/db_br111_train_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/pakiwujipubi/ihxARHc/grapefruit_candy_slices.pdfIn PDF document text
    • https://cdn.sqhk.co/suvotoruwot/cghGbD8/chameleon_run_apk_2._1._2_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pulovafafita/1jeRjaR/rilotalazojib.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/wutisigila/what_another_word_for_study_hardest.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/mailchimp_email_template_in_gmail.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/aulad_bhojpuri_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/ripefadifikadobumula.pdfIn PDF document text
    • http://mevezexagugon.rf.gd/57880986926.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/xerenep.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/savekilu.pdfIn PDF document text
    • http://leporib.epizy.com/kennen_mid_guide_s8.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/67255201694.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/97653533304.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/bleacher_report_nfl_picks_week_10_2019.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_off00010191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10191 5852 bytes
SHA-256: b887147f95cf8d7dd01d6d8f9e606a1e753f85d10730550520d8477085ef59bd
font_01_sfnt_off0001157c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157C 10672 bytes
SHA-256: a8d1caeb1d5e4012c2b9a934c00119145524cdd2626f79f754292c1f748c9127

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