Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada72ff323bb6cf6…

MALICIOUS

PDF

77.7 KB Created: 2021-03-28 15:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8617a558676c35b816f9eae689f4ccea SHA-1: d19faa2359574471cf2e371950ca0641461b7d36 SHA-256: ada72ff323bb6cf6bc0a1838d350ca7792315692c2f0ded73d1759a0e496a20b
96 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to 'hymnal sheet music', suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/123?utm_term=i%2527+ll+fly+away+hymnal+sheet+music
    • http://monongzhlh.space/cycled_meaning_in_englishgnx66.pdf
    • https://static.s123-cdn-static.com/uploads/4369911/normal_60089f137e02c.pdf
    • https://cdn-cms.f-static.net/uploads/4402504/normal_60509b6dcf068.pdf
    • https://static.s123-cdn-static.com/uploads/4376086/normal_5fe1453960ae5.pdf
    • https://cdn-cms.f-static.net/uploads/4379732/normal_605d60bf8108b.pdf
    • http://gbo.guru/valid_objections_to_deposition_notice_californiaqqryb.pdf
    • http://kunozoxutokusu.mygamesonline.org/anne_of_green_gables_book_series_free_download.pdf
    • http://walkover.me/sololearn_javascript_answersxqrsp.pdf
    • https://static.s123-cdn-static.com/uploads/4450154/normal_5ff0afe05ef65.pdf
    • https://static.s123-cdn-static.com/uploads/4380393/normal_6009a705969a4.pdf
    • http://reawolt.online/kalanefebevelulumaxbdk3n.pdf
    • http://nunokitatamipo.22web.org/juvogabigisiruminaluziw.pdf
    • http://gufutaca5.xyz/92941494818hmy1c.pdf
    • https://static.s123-cdn-static.com/uploads/4461763/normal_5feb5f342aef6.pdf
    • https://static.s123-cdn-static.com/uploads/4407983/normal_5feb18f6d4438.pdf
    • http://lulodexov.scienceontheweb.net/captivating_guided_journal.pdf
    • https://cdn-cms.f-static.net/uploads/4413362/normal_60502f965b0b7.pdf
    • https://cdn-cms.f-static.net/uploads/4452608/normal_60471c6a3ee15.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bagugexasorip.myartsonline.com/79220919179.pdf
    • http://gidubabe.myartsonline.com/is_blast_protection_worth_it.pdf
    • http://ziwawadu.rf.gd/gadogewofugakezatusi.pdf
    • http://zorikeroz.onlinewebshop.net/what_are_some_misconceptions_about_mental_health.pdf
    • http://zuvidetalenaras.epizy.com/bairi_kangana_video_song.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_off0000f11f.bin
819ce7d52768b6226505af7aec044a54b0e39e06193253305d0dd1c2aa7d5736
pdf-font-stream PDF embedded font (sfnt) at offset 0xF11F 5192 bytes
font_01_sfnt_off000102c9.bin
853a004f0c69a933f059b67f43be48e93963e40f6759ade052857d33076206cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x102C9 11548 bytes