Malicious PDF — malware analysis report

Static analysis result for SHA-256 91716f01c3f4e272…

MALICIOUS

PDF

78.1 KB Created: 2021-02-17 17:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5a36471626ebebbab0d12cb7686a9b01 SHA-1: 242009db26be746575c2676bbc89d77d474ea30e SHA-256: 91716f01c3f4e2720a0c84ded5ff644544832195aab56140e2061890ab4c7dae
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'maypoin.ru', which is likely used to deliver a secondary payload or conduct phishing. The document body is heavily obfuscated, suggesting an attempt to hide its malicious intent.

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://maypoin.ru/strik?utm_term=is+lime+green+a+fall+color PDF link annotation
    • https://cdn.sqhk.co/kavejufa/ig6UQ9c/nickfinder_nickname_generator_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_601bfbb402d70.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/je8DgjV/63857573517.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/jQyhihj/fatobize.pdfIn PDF document text
    • https://cdn.sqhk.co/rigepasemapa/gQYjaYt/galaxy_star_light_projector.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/erol0hg/vudolaturapijepusun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483591/normal_5fcb0f1308825.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/7Dgiiej/mezimibaziwaruzafif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408197/normal_60048bbe32698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453108/normal_6010f60fec3f0.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/mupukesunobaga/hymne_russe_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/349785870.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/turn_off_auto_sync_gmail_android.pdfIn PDF document text
    • http://jasigobup.epizy.com/79403555000.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/kimum.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/31342956030.pdfIn PDF document text
    • http://palulofegag.rf.gd/15510122691.pdfIn PDF document text
    • http://xukaneteris.epizy.com/figidogurexugawagatutoxeg.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/july_2018_calendar_printable.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_off0000e752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE752 4844 bytes
SHA-256: 10a37926f9bfa7fb0ba92ef09d3dd8609aa4d93a3abf80d3d7e646c7c83c213d
font_01_sfnt_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 11440 bytes
SHA-256: 0dc635103d39b62513bda2130dbda446b6d89d58626d25f1bd397a2ff9801ac9
font_02_sfnt_off00011d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D73 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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