Malicious PDF — malware analysis report

Static analysis result for SHA-256 51450c68ca04966e…

MALICIOUS

PDF

79.3 KB Created: 2021-03-17 19:32:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: dbd9de7e7536080d1bf0c817feec546e SHA-1: 5c04b98aa0de6780ff3a22ff014397050000b573 SHA-256: 51450c68ca04966ebf0447d2000cd717be5164748b43d5f6aac2b223926f811e
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by both ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains keywords related to 'safe haven pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to a malicious site. No scripts were extracted, but the presence of the malicious URL is a strong indicator of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/wix?keyword=safe+haven+pdf PDF link annotation
    • http://wajabub.22web.org/76365406344.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/the_colour_of_magic_book_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/Khb9g3r/fugoxir.pdfIn PDF document text
    • https://cdn.sqhk.co/leruwexikud/hahaRhi/top_10_viral_videos_of_2020.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/what_time_period_is_sherlock_set_in.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://funitavib.rf.gd/how_to_add_effects_to_video_in_premiere_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/gezavarenigeralet.pdfIn PDF document text
    • http://jomovexujufadi.epizy.com/56966413594.pdfIn PDF document text
    • http://samanofi.epizy.com/dowelusanobifalusigulezem.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/56639702324.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/belews_lake_fishing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/percentage_increase_decrease_questions_and_answers.pdfIn PDF document text
    • http://lafagelupuf.myartsonline.com/grammar_practice_book_grade_3.pdfIn PDF document text
    • http://bonanelokuweje.rf.gd/56373914474.pdfIn PDF document text
    • http://viwuwijagabote.myartsonline.com/30137645562.pdfIn PDF document text
    • http://zegetafirotazaz.atwebpages.com/jinumazikitemen.pdfIn PDF document text
    • http://deniwejatugege.epizy.com/minn_kota_i_pilot_link_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/35883518456.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7C 4536 bytes
SHA-256: 825ffbb1617fd95907710dc5d43cd9a206f0ff92415a4208fd06f92e54e3465b
font_01_sfnt_off0000fad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD4 11696 bytes
SHA-256: ea3c48267dd32793d2a09a5d27ee2c107c37ab34eaf29333bf213383d5b43c62
font_02_sfnt_off00012275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12275 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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