Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8e90410d8b4550…

MALICIOUS

PDF

69.2 KB Created: 2021-02-07 07:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 057735a93fb670956f00fb44e9264f68 SHA-1: 8ddfd7da512236385c1956835f1081da90b5d77d SHA-256: 4b8e90410d8b4550d48c7eefc32c99c04e244f03a76f992c1a9fbe58df55e673
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to 'https://baarspo.ru/aws?utm_term=crystal+report+viewer+visual+studio+2019', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to software, likely a lure to encourage clicking the malicious link.

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/aws?utm_term=crystal+report+viewer+visual+studio+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471091/normal_601c7349223fe.pdfIn PDF document text
    • http://gonuzigodu.iblogger.org/9335682859.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/ibhfmhf/16429101789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378390/normal_5febb5b9ad321.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/eAhcODa/adventureland_water_park_altoona_iowa.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/jhg721T/retroarch_tutorial_ps_vita.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vepilezora.epizy.com/naina_song_mp4_male_version.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/56461728957.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/suxetujaf.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/cartoon_photo_maker_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/36986029675.pdfIn PDF document text
    • http://lelexuxifu.epizy.com/xipij.pdfIn PDF document text
    • http://beninoduvewer.epizy.com/xasesitiridojezir.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/cdc_catheter_related_infection_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/android_studio_ext._kotlin_version.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/jaguar_car_wallpaper_image.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_off0000cff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF7 5596 bytes
SHA-256: c5ace7c00ef393bfbb24b6bf61c5ba85b744c635fe96c8a4cb78ba5e593f80c6
font_01_sfnt_off0000e32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32D 10676 bytes
SHA-256: 134a074768c7720ae38b97d0b2476f78dd2f1dc547dd85e832d4fa880b32de67