Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ff573005338039…

MALICIOUS

PDF

76.1 KB Created: 2021-02-17 08:38:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6c2a0deb07ed61e0dee9fe01e4b1bdb6 SHA-1: fac011a1cf25936cdd65ae7efdf14e8bd95e6b2d SHA-256: 36ff573005338039dd8e03b1b40ab4815fa3b31186ca5cd00f351867686286d6
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to 'baarspo.ru', which is likely used to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'jokes for adults clean'. No scripts were extracted, but the PDF structure and embedded URI heuristic indicate the primary attack vector is likely through the malicious URL.

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=jokes+for+adults+clean PDF link annotation
    • http://gasufulezexe.22web.org/85197103451.pdfIn PDF document text
    • http://idealica-co.site/vulopiganulisogitekaxjz.pdfIn PDF document text
    • http://merishwheelrecords.com/5782735703btfr7.pdfIn PDF document text
    • http://tajeromodovo.66ghz.com/bilososizebejexexamivegu.pdfIn PDF document text
    • http://zawugexoj.22web.org/equalizer_2_movie_parents_guide.pdfIn PDF document text
    • http://gromstroy.com/jukirobonakipg9ez3.pdfIn PDF document text
    • http://ukranews.icu/fodunnylcj.pdfIn PDF document text
    • http://bioforcecolumbia.site/222480742903t84e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://momugegunimex.rf.gd/hotmail_app_for_ipad.pdfIn PDF document text
    • http://duwazobikojuk.epizy.com/xurim.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/brambles_industries_limited_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/bharat_ane_nenu_songs_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/gibawugalit.pdfIn PDF document text
    • http://jibogifimot.epizy.com/aayegi_barsaat_kahan_jayenge_dj_song.pdfIn PDF document text
    • http://dokedupaguxo.rf.gd/70295505313.pdfIn PDF document text
    • http://fotizerenodafik.epizy.com/historia_de_un_amor_sheet_music_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/wipivofolag.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_off0000ef41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF41 5068 bytes
SHA-256: 77bec73be8110569671d6c3a95af076cb1ab96d0a2d834ba8f077cb968028b56
font_01_sfnt_off00010094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10094 10264 bytes
SHA-256: f5191844a6768174718efc4e7904aff50819934167a5196d6eb513b07fb2da81

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