Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2869b96396d6bd7…

MALICIOUS

PDF

86.7 KB Created: 2021-04-05 07:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92a13aa2f88084188e5c800126686ccc SHA-1: 70e691441162faef0be290a0b725bb9aadea4405 SHA-256: b2869b96396d6bd7982fdbbf5e0de983bdc255aa632ec057e10d8ae94d577262
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to host malicious content or redirect the user. The document body, though heavily obfuscated, suggests a lure related to educational materials to entice clicks on the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/wix?keyword=combined+operations+word+problems+worksheets
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/6275355.pdf
    • http://chategratis.online/zidomobujowe56elg.pdf
    • http://zajiledafalam.getenjoyment.net/kudebelamezolemukaluti.pdf
    • http://boforobevuziko.mywebcommunity.org/suwuwopizidufitivo.pdf
    • http://tewatag.medianewsonline.com/37392173485.pdf
    • http://topukovatawosu.sportsontheweb.net/xewoxakikanorojo.pdf
    • https://mitojebani.weebly.com/uploads/1/3/2/7/132711961/dozoroz.pdf
    • http://usesoda.pro/gomoku_strategy_guideoxwnh.pdf
    • https://nanagufema.weebly.com/uploads/1/3/1/4/131483019/baxajaso_bilazova_kokexa.pdf
    • https://rirulejirosajis.weebly.com/uploads/1/3/4/3/134320684/8720798.pdf
    • http://vopezikililurab.mygamesonline.org/katunimubegatuzin.pdf
    • http://wolifote.getenjoyment.net/charge_air_pro_compressor_manual.pdf
    • http://bestpriceforukraine.xyz/instructions_for_a_clear_blue_pregnancy_testyxdjc.pdf
    • http://ideal-it.fun/2008_ski_doo_summit_800_owners_manual1fdww.pdf
    • http://hugertely.xyz/mario_kart_8_iso_downloadqwfn0.pdf
    • http://pewujok.mypressonline.com/dokujided.pdf
    • https://rorujazikuje.weebly.com/uploads/1/3/1/3/131379225/055c1694f66.pdf
    • http://vofigasu.medianewsonline.com/aoac_950._46.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_20841eeeb41346e99ffe6f2dbbff1281.pdf?index=true
    • https://s3.amazonaws.com/takateg/pearson_earth_science_answer_key.pdf
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_e98b15b528c34a2b881c6de8bee0f72d.pdf?index=true
    • https://s3.amazonaws.com/tugabijenovili/word_letterhead_template_uk.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcba.bin
0dc387f3034e524ef9cd207e37d9af280f872b7aff622bcb6ffc561b669d083e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBA 5400 bytes
font_01_sfnt_off00010eed.bin
3ea1aee76924f85046ce09cecd124387bbf9bb52be331e4e85bc92c52914c898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 12088 bytes
font_02_sfnt_off000137d9.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137D9 16092 bytes

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