Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91a5c23e63d03c5…

MALICIOUS

PDF

85.2 KB Created: 2021-03-23 23:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 859c2de75ac5e6de3f88fb0ed9e57138 SHA-1: 5affe27f818e20a01b6f0f64f3a4f209102b720c SHA-256: e91a5c23e63d03c528aea2d3436783362999e55e9bf188340d3a843a14565eb9
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://bologen.ru/award?keyword=zoology+books+for+bsc+pdf PDF link annotation
    • http://vazitafolozif.22web.org/weekly_attendance_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_602042a877382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489586/normal_5fe6a26e62315.pdfIn PDF document text
    • http://gijixig.22web.org/fivovikulofok.pdfIn PDF document text
    • http://xezupotivevilib.22web.org/tasilatokigu.pdfIn PDF document text
    • http://reparefojig.iblogger.org/88307956142.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372382/normal_60020bc8cc33a.pdfIn PDF document text
    • http://kedusigodozop.22web.org/7201614994.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
    • http://zafitubebetero.rf.gd/break_even_point_accounting.pdfIn PDF document text
    • http://xofisimubi.epizy.com/baby_girl_names_with_ed_in_them.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/clasificacion_de_numeros_decimales.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/the_blue_lagoon_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/cannon_busters_ost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2bb3ec1-a34a-41f3-937f-d9dc8e369664/legorotolekufufexose.pdfIn PDF document text
    • http://jipudovisubu.rf.gd/31299383859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431e7300-8d3c-4b06-8843-afc23cfe7432/72949305775.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/kabonijulun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af1c58f-dbb4-4964-a927-528d4cd30a4a/faximabig.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/bozobi.pdfIn PDF document text
    • http://bobamexexaru.rf.gd/71663983511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa8be6c-2ad6-44c0-aa07-4e3bbfd15ea4/zasuwusuwemegavib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a0fbf8-48da-46b0-b04d-fdbb3d8acda2/46608760090.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/how_to_become_a_vet_tech_in_wisconsin.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/good_quotes_from_catching_fire_book_with_page_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/2114545006.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AA 4812 bytes
SHA-256: 8fca1ee2e6bc4df3dc5fe51d6732d41955c67fcf2aec1b535e11bc5ced938cf0
font_01_sfnt_off0000f10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10F 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000f99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99D 11668 bytes
SHA-256: 47dba174a2dc560b1d18935b866887ab23eb3c655a09f3ee9be3b02724426add
font_03_sfnt_off000121b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B0 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
font_04_sfnt_off000136c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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