Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a36b06d5150d0d9…

MALICIOUS

PDF

80.5 KB Created: 2021-03-04 09:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 318c9fff6be23a134ce1178c2f027a26 SHA-1: 1173ea0aa92ce9e4ba58ebfe95f4398281d3bf92 SHA-256: 2a36b06d5150d0d94bc3a384029c8b6bb0e3f7a3f366bfb57e2fd4278937aed4
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with a high probability of being malicious. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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://jottigo.ru/wix?keyword=trius+one+step+trap+manual PDF link annotation
    • http://lezigovedavide.getenjoyment.net/niveles_de_prevencin_de_leavell_y_clark_diabetes.pdfIn PDF document text
    • http://zdorovienashevse.xyz/32122099645tv70i.pdfIn PDF document text
    • http://juniwasobevi.22web.org/tizodozog.pdfIn PDF document text
    • http://podeves.xyz/124241260632wykk.pdfIn PDF document text
    • http://pro-komp-master.website/how_to_remove_head_on_oral_b_battery_toothbrush4gdsq.pdfIn PDF document text
    • http://jarowulizose.sportsontheweb.net/bapodebizipozorelumigo.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/still_alice_book_how_many_pages.pdfIn PDF document text
    • http://dress-russia.ru/qpsk_modulation_waveformcbocq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://punexowimuseva.epizy.com/bmpcc_4k_luts.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/guvuzopozevanuzaned.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/kacheri_aarambam_songs_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/indies_pharma_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/bypass_google_account_pc.pdfIn PDF document text
    • http://telagivepovadul.epizy.com/rpg_ambient_sounds.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/wugubexezivak.pdfIn PDF document text
    • http://duxepivol.myartsonline.com/mageji.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/61412695090.pdfIn PDF document text
    • http://vutegug.epizy.com/86143753352.pdfIn PDF document text
    • http://mumupaju.epizy.com/cheat_sheet_regex_r.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_off00010207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10207 4916 bytes
SHA-256: 21185c075d9c8532d5f05356777318e7fda4b0dea5121d5ef5b8c8d9e80a7203
font_01_sfnt_off000112a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A4 10212 bytes
SHA-256: a3f568fd4825688fe98583de192d48dcd41fd70c0c86bf12cbf6db1dd6968124

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