Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d753b8c340f39c…

MALICIOUS

PDF

82.7 KB Created: 2021-03-14 02:27:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a52e0d1a7e968e9465f2414635d2e560 SHA-1: da99fcfb79471a9e35c596ae0b9c31077dfb0d5b SHA-256: 70d753b8c340f39c84b9ef11c9a164ffed64b95cbe4395311b54ac499424e99a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including a link farm heuristic firing, suggesting an attempt to direct users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URL and the PDF's structure point towards a tactic of using seemingly relevant content to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/wix?keyword=how+to+hack+hungry+shark+world+ios
    • http://frasqen.online/777972849073efg3.pdf
    • http://bazuzog.22web.org/my_cloud_home_4tb_setup.pdf
    • http://zesijesagevonot.22web.org/format_of_one_column_cash_book.pdf
    • http://timecodes.net/badger_meter_pc100_manualrennj.pdf
    • http://bewewafip.scienceontheweb.net/uae_new_arbitration_law.pdf
    • http://karma-911.com/83592253937lbojs.pdf
    • http://vizexibidoxi.getenjoyment.net/80033846260.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kumasala/i_dont_care_lyrics_by_ed_sheeran_az.pdf
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_d49aebefbe514f4b8f29af249c1ab18c.pdf?index=true
    • http://duzoweserunojoj.epizy.com/aritmetik_dizi_toplam_forml.pdf
    • http://bajupigirosinaf.atwebpages.com/daruguzufilesejuweradujum.pdf
    • http://wuxofiwuludut.epizy.com/fundamentals_of_physics_9th_edition_by_halliday_resnick__walker.pdf
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_7d1cea5933f94ddcba2fcfad554b2a84.pdf?index=true
    • https://s3.amazonaws.com/nopomewegobij/sumoga.pdf
    • https://s3.amazonaws.com/bejeseja/29331662177.pdf
    • https://s3.amazonaws.com/woxorojero/vupebafisutebubiguwuv.pdf
    • https://620678a0-8f5b-407b-881a-8a96a128c1c4.filesusr.com/ugd/25b7a6_c25e4a4f823b4698af99ca45f80cfa8f.pdf?index=true
    • https://11e0ccb5-01dd-4757-ae93-f6f3b4f5ca32.filesusr.com/ugd/1a2ce6_8cf7151421ce4bc29d2dd46eb5b89540.pdf?index=true
    • https://s3.amazonaws.com/pozokimepe/asset_management_guidelines.pdf
    • http://tikimiwuwal.myartsonline.com/nuvidesetumemizo.pdf
    • https://s3.amazonaws.com/tarizirefevifab/hitman_absolution_challenges_guide.pdf
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_d33e935e47764db5ba630ec0303eeca6.pdf?index=true
    • http://dawutanarav.epizy.com/aashto_green_book_2011_free.pdf
    • https://s3.amazonaws.com/padanivozeb/62918547466.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb72.bin
2e9221ecf341939b5c27d60a943d31686bd23c9d7500159900d1fc7359e7c9e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 5184 bytes
font_01_sfnt_off0000fd13.bin
ff28d87cbcc04e7ae6efd182678b47655d4e8c484e969019e861a56db4b9e5ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD13 22868 bytes
font_02_sfnt_off00012eca.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECA 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.