Malicious PDF — malware analysis report

Static analysis result for SHA-256 739a317a90b3261a…

MALICIOUS

PDF

79.2 KB Created: 2021-04-06 05:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e08adbc6231282541d94d395778425e3 SHA-1: 3d77457d2542922a9f403bc0ad4660668513933e SHA-256: 739a317a90b3261a36dd75bb4472d77a71d4334820c34a0a75a6782ebe6b4723
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when visited, likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to water softener maintenance, suggesting a targeted phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=how+to+maintain+a+whirlpool+water+softener PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5fd9abe4982a9.pdfIn PDF document text
    • http://theplafond.xyz/puxukuwemelujapidofexazzuvb.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/VicHFhe/pamekatow.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/d30GsSH/usher_slow_songs_playlist.pdfIn PDF document text
    • http://topcreditmonitoring.info/872505320725fkws.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/hxscA3Z/nasty_gal_shoes_sizing.pdfIn PDF document text
    • https://cdn.sqhk.co/joninopi/hcijZam/raid_shadow_legends_dark_elhain_guide.pdfIn PDF document text
    • http://axecheat1.xyz/green_technology_in_civil_engineeringrwvyy.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/Lhagiej/space_invaders_game_boy_color_codes.pdfIn PDF document text
    • http://insuranceautousa.com/the_secret_garden_movie_1993_film_locationw5kz8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_6021a44d48677.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zawanaxakav.epizy.com/8535351454.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/abrahaminte_santhathikal_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/97552631756.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/kixiragomilukurejovid.pdfIn PDF document text
    • http://vetanafajodomek.epizy.com/dimensionality_reduction_machine_learning.pdfIn PDF document text
    • http://kuzoxutinilidog.rf.gd/lasixirexotifefofoxufutug.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/ruxupuvog.pdfIn PDF document text
    • http://regipikiwubadov.epizy.com/a_view_from_the_bridge_text.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/apna_time_aayega_video_song_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/27154221322.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_off0000f761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF761 5192 bytes
SHA-256: b85238af7b30c9c08cb88f66a8cc2ac45db03abe221900dee985b3a6b40be9c5
font_01_sfnt_off000108e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E9 10760 bytes
SHA-256: 1b6a6fdfd847e5b20e50f3c5ee921980697b2d34e7f648d6da2d5c9b7a58c957

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