Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b6acc995fa316b…

MALICIOUS

PDF

162.0 KB Created: 2021-03-09 03:27:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 30903a10a37aa33333958c82a3103732 SHA-1: 0192f75ee84f431d598764a562ae2077e1b09033 SHA-256: f4b6acc995fa316b1e5c1c2e123fe8f922bd4e950d1a266ea86e81e7a81c8c0b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this assessment. The document body, though heavily obfuscated, suggests a lure related to 'nutrition pdf notes', likely to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://mezovuduw.ru/award?keyword=nutrition+pdf+notes PDF link annotation
    • http://vudifabofugejij.medianewsonline.com/95815564857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380070/normal_60143fe957913.pdfIn PDF document text
    • http://vivubowi.getenjoyment.net/pusorilakebewunisoj.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/26119154228.pdfIn PDF document text
    • http://gepavozo.mygamesonline.org/of_more_than_average_height_synonym.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_603f8a7b3467a.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/67354061625.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/41915176536.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/the_diamond_of_darkhold_ending.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/vuridokufesefamalu.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/honda_ridgeline_transmission_fluid_change_interval.pdfIn PDF document text
    • http://xanusojuruxu.sportsontheweb.net/m-audio_fast_track_ultra_driver_download_for_mac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456116/normal_5fe583bc1672d.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
    • https://s3.amazonaws.com/jivagajamav/nisipesedejatewipidavarit.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/old_school_bagel_tulsa_order_online.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/74085869431.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/incorrect_spelling_of_name_on_credit_report.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/can_a_food_diary_help_you_lose_weight.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/add_1st_edition_dungeon_masters_guide.pdfIn PDF document text
    • http://medexode.atwebpages.com/2016_amc_12b_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/44163572003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae0d2ff4-a8e5-460f-91ad-f485c61b367f/10322576287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a8c892-f3e4-46c0-a3fc-2b2023e11130/93651971025.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/liwiv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22096 4644 bytes
SHA-256: 38cf70417932f43a38bfaacc5d1b66fd66acf6c5b0b4410ca37c55321b27da70
font_01_sfnt_off00023074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23074 10548 bytes
SHA-256: bc33b1d37a3f8dd682193783584ad90f1a5b1a3edc9219d4aa1f469f4d6e91a5
font_02_sfnt_off000254ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x254BA 16628 bytes
SHA-256: aa2fe9bb733be4bfbbd55af0d3a1da82bf7a9acbecc54a7bacca1504af719781
font_03_sfnt_off00026b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26B9E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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