Malicious PDF — malware analysis report

Static analysis result for SHA-256 966b75dadecc0ade…

MALICIOUS

PDF

79.9 KB Created: 2021-04-06 13:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 651e093c37328fb70963e23cfe424a6b SHA-1: 61e2b9560b06c8ad7b11df652c6362b72683db24 SHA-256: 966b75dadecc0ade4abbce89ef0b9cae5e298111d4c4d3225ec84a803e42427d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

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://baarspo.ru/wix?keyword=zoo+tycoon+2+jurassic+park
    • http://qqkaxes.xyz/657300121329rpfu.pdf
    • https://static.s123-cdn-static.com/uploads/4393190/normal_5fe12a4dd8ab0.pdf
    • https://cdn-cms.f-static.net/uploads/4380214/normal_605423290283e.pdf
    • https://cdn-cms.f-static.net/uploads/4393511/normal_600ea258166b9.pdf
    • http://warixedivukinat.mygamesonline.org/what_are_the_best_cordless_phones_for_hearing_impaired.pdf
    • https://cdn-cms.f-static.net/uploads/4392869/normal_6025f378d6acf.pdf
    • https://cdn.sqhk.co/nonobepimaf/Difjggj/daxinalotibujufazezepiw.pdf
    • http://liwexun.mywebcommunity.org/analytic_geometry_6th_edition_douglas_riddle_free_download.pdf
    • http://salopkisa.website/crock_pot_pork_loin_cook_time_on_lowg91zp.pdf
    • https://cdn-cms.f-static.net/uploads/4488581/normal_5fd6677ea0741.pdf
    • https://cdn.sqhk.co/luwagoma/aNrghjh/my_talking_pet_online.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kisalonokexiwi.atwebpages.com/los_adjetivos_posesivos_ejercicios.pdf
    • https://s3.amazonaws.com/kudowo/jspdf_autotable_set_column_width.pdf
    • https://s3.amazonaws.com/zabejuvijolu/zusipinivuniku.pdf
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_8538e54801084cef9ed947c099a51d6a.pdf?index=true
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_6b329602262e41b19ab247d1a3f716ff.pdf?index=true
    • https://s3.amazonaws.com/zulezov/bohemian_rhapsody_piano_notes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f759.bin
92b447a17e17ee79289d1f484a282aeedb6f9237385e49630f131dc9097560f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF759 5224 bytes
font_01_sfnt_off0001094c.bin
a1616e194b6271a0f37bda3f48afa657fee492a6f3021a4a79c80337a11b8146
pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 12128 bytes