Malicious PDF — malware analysis report

Static analysis result for SHA-256 32596fd1655511c3…

MALICIOUS

PDF

83.8 KB Created: 2021-03-23 19:07:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7527875f1aeb4a4b101554cac6702f14 SHA-1: 534bd2552aceff27498f6a607468fba4653b12c5 SHA-256: 32596fd1655511c3a26282a7c5c868faae9c1219a302753e221525e8a80159ba
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains text related to 'Make sound apk for android', suggesting a lure to download an application. The embedded URI points to a URL that further supports this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jacksth.ru/123?utm_term=make+sound+apk+for+android PDF link annotation
    • http://repair-telefonov.ru/light_ball_pokemon_sworddobgs.pdfIn PDF document text
    • http://energierecrute-emplois.com/metformin_xr_costeo9g3.pdfIn PDF document text
    • http://gnoogle.site/vaaste_song_lyrics_bestwapyp2v8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403129/normal_5ff5b7d2554ff.pdfIn PDF document text
    • http://instapresent.site/hp_officejet_4500_printer_manual4rdo2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_600eecb05a587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419003/normal_5fe91196a444b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476282/normal_5ff4cc8c3952d.pdfIn PDF document text
    • http://devlp.club/how_to_use_rslogix_50000xvix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387406/normal_603550e6605f0.pdfIn PDF document text
    • http://subbellassecret.com/76398801828ngxi1.pdfIn PDF document text
    • http://paganel.world/bed_wars_fortnite_code_matchmakingfx6vd.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/xozeb/56223429184.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/dometic_brisk_ii_air_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d4f41b-3d94-416f-8e9b-d651341d43a7/xasuravogafinorebibizud.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/rinot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56293d9b-2b1f-448c-9514-e80fca354979/electrical_engineering_jobs_in_dubai_for_fresh_graduates.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/72747268614.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4C 4872 bytes
SHA-256: d186b40a9f777d34be7ef381d2979da98c69ba9db3e747e345150ee6122a782d
font_01_sfnt_off00010beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEB 11296 bytes
SHA-256: 7da53b178256d106b3d4ce9ce9479ba0d16e3a7112a9d1350333ace003d2fb3c
font_02_sfnt_off0001326d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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