Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9c84f8c64f704e…

MALICIOUS

PDF

165.3 KB Created: 2021-03-18 16:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 53c7a701d36d14d83e0d17f5c35f8125 SHA-1: 6e72febe320b901da988a5f00515a4fb4fde44e3 SHA-256: 5d9c84f8c64f704ead651fa5a0860724c6c50288a99c523c4bd2535e1be94186
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 ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, appears to reference a handbook, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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/123?utm_term=bd+chaurasia+handbook+of+general+anatomy+pdf PDF link annotation
    • https://cdn.sqhk.co/bexefoboxevi/hfXEghK/52704995393.pdfIn PDF document text
    • http://tijudiwulewanuw.getenjoyment.net/ruger_lcp_ii_380_acp_review.pdfIn PDF document text
    • http://blablablacar.online/sagemcom_fast_5260_hack130y0.pdfIn PDF document text
    • http://nikaold.site/ritolojifotaxulazitafumuuua.pdfIn PDF document text
    • http://confirmationhelpcenter.com/tawexatilamokapiko4moyo.pdfIn PDF document text
    • http://pubggaming.online/what_holidays_is_the_banks_closed_2020fzzxa.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/pdf_voice_reader_for_iphone.pdfIn PDF document text
    • http://japancar-sib.ru/does_wendys_sell_burgers_in_the_morningm1reu.pdfIn PDF document text
    • http://reform-st.ru/30263086421yt286.pdfIn PDF document text
    • https://cdn.sqhk.co/bofilewidil/DdgdKcU/rubber_chicken_soundboard.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/ghajfWY/13597989160.pdfIn PDF document text
    • http://energierecrute-emplois.com/target_beats_studio_3_grey1dt2z.pdfIn PDF document text
    • http://ch-redirect.icu/dungeon_crawl_stone_soup_draconian_guidesc3df.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/jgdjeic/fikexizenasisemepagoka.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/zukogi/chart._js_tooltip_currency_format.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/21_day_sugar_detox_crockpot_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/industrial_revolution_worksheet_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/jatazosekupowuxetad.pdfIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_feb2abbc22974c36924e7d5d9f947e81.pdf?index=trueIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_4666f242f36d42b0912a6f4e1114cba2.pdf?index=trueIn PDF document text
    • https://5563968e-3cf5-463b-8312-7915ab8a4794.filesusr.com/ugd/cd90d1_7c54b573bc8f43f7b3565173a404e846.pdf?index=trueIn PDF document text
    • http://kopolug.myartsonline.com/14351421539.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/45056186177.pdfIn PDF document text
    • https://c22e5cf4-338a-4003-9cad-c1cb0be29285.filesusr.com/ugd/3db607_f90fac7684834cdda3045d00fee6f7c6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/simlock_check_android_kostenlos.pdfIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_8494546698084bde8f852a635934a317.pdf?index=trueIn 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_off00023e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23E63 5924 bytes
SHA-256: fa380af3b17430e3445ac2d9b37c20cbce9dcfe1405b0458051a231e6a889ad5
font_01_sfnt_off00025269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25269 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off00025af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25AF9 12096 bytes
SHA-256: d14fa549ec778223683916db5d2c0eac195d3fbb58e46d01eb2795b4cf4048f4

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