Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea34f63c7c48c5ee…

MALICIOUS

PDF

76.3 KB Created: 2021-03-19 01:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9854402e5bfa40bfc007f044adcaef4d SHA-1: 5720f2786b23215ad93b257ef0ebf10b14c77e8b SHA-256: ea34f63c7c48c5ee24a3541d1a49fd2f0d3d75f1c454f98ad142cd95f2e4ec5c
104 Risk Score

Malware Insights

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

The file is a PDF with a high ML classification score and ClamAV detection, indicating malicious intent. The document body, though partially garbled, contains text suggesting a lure for a 'free PDF', and a heuristic identified an external URI pointing to a suspicious domain. This combination strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://mezovuduw.ru/award?keyword=aceptacion+radical+pdf+gratis
    • https://cdn.sqhk.co/petebeki/Qgggcjm/100_funny_fart_sounds.pdf
    • https://cdn.sqhk.co/vubiwete/cWzkhb9/american_athletic_conference_future_football_schedules.pdf
    • https://cdn.sqhk.co/vawikepaf/Ghjjaj4/invasion_of_privacy_means_in_law.pdf
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/5fca4.pdf
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/ef4ef39.pdf
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/930567.pdf
    • https://biwusudixibel.weebly.com/uploads/1/3/3/9/133987636/nigat_wigizeza_wesig.pdf
    • https://cdn.sqhk.co/baruduwege/PbhiLjh/hangman_words_list_for_seniors.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pibekolovaxizon.epizy.com/bigetadidimowitewevesawuf.pdf
    • https://s3.amazonaws.com/remuv/zujolak.pdf
    • https://s3.amazonaws.com/feseni/consew_226_parts_book.pdf
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_1a3d7e1e1c414990b0396415c8da2a5c.pdf?index=true
    • https://s3.amazonaws.com/robumuduluwise/difference_between_synchronous_and_asynchronous_motors.pdf
    • https://s3.amazonaws.com/fikuvine/napif.pdf
    • https://s3.amazonaws.com/loxopudizus/gubukojapozafaked.pdf
    • https://s3.amazonaws.com/loneminovu/23318482519.pdf
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_48c5da6f3a83472180a84df5628fa17f.pdf?index=true
    • https://s3.amazonaws.com/tasufagijaremo/30098707950.pdf
    • http://ritarejameja.epizy.com/music_sheet_for_guitar_and_piano.pdf
    • http://migepelulu.epizy.com/56256495607.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec72.bin
0241c2049be9c013f7fcdc32ac77525dbac6ab5e5951276f6ef46f59a50f12ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 5312 bytes
font_01_sfnt_off0000fe98.bin
5975878aa268dc930879a16a68fe1ccc61744b2950df3998529fd47a65db1e9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE98 12720 bytes