Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d24a620c360d85…

MALICIOUS

PDF

78.5 KB Created: 2021-04-19 20:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e4209e6653439e0d78c3bbc6570496c SHA-1: 7f0ff1a92baa319c40da098d82c0accc09302173 SHA-256: e8d24a620c360d85f1531183ab0b3c9bc380aae97b621c44af88ba679f84e789
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with the primary one being `https://xezojetit.ru/strik?utm_term=prisoner+b+3087+quotes+about+perseverance`. This URL, along with others, suggests the document is used for phishing or malware distribution. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, but no clear textual lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=prisoner+b+3087+quotes+about+perseverance
    • http://xivagoz.22web.org/the_blade_itself_incites_to_deeds_of_violence_homer.pdf
    • https://cdn-cms.f-static.net/uploads/4410013/normal_6057136f2128b.pdf
    • https://cdn-cms.f-static.net/uploads/4372100/normal_60586b5180929.pdf
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5fe9f8381a831.pdf
    • http://pozuwigazabo.22web.org/focusrite_saffire_pro_40_vs_scarlett_18i20.pdf
    • https://cdn.sqhk.co/nopawuwam/EmKYhb1/vuxudibisakisosumemitew.pdf
    • https://cdn.sqhk.co/tezizejaropu/jaTXicA/sen_marsha_blackburn_office.pdf
    • https://cdn-cms.f-static.net/uploads/4455886/normal_6018b550c35d9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://viwukapatajomi.rf.gd/29420355838.pdf
    • http://botibaxar.rf.gd/66781633070.pdf
    • https://uploads.strikinglycdn.com/files/5a6c4fa5-ca41-4f9b-b845-d6a3b9287f7a/62159066899.pdf
    • http://vejidot.epizy.com/75787168432.pdf
    • http://devisufuxuvit.epizy.com/a_sperm_motility_report_graded_2._0.pdf
    • http://wipedeposadav.rf.gd/41630551002.pdf
    • http://xipibevamelun.rf.gd/danby_6000_btu_portable_air_conditioner_costco.pdf
    • http://mevetilozavasep.epizy.com/tubuwupikog.pdf
    • http://dotabujov.rf.gd/dafosunetikofut.pdf
    • https://uploads.strikinglycdn.com/files/4b0ad559-7067-4e51-b5a8-0cb001716ce7/67271791174.pdf
    • http://nomagupave.rf.gd/1000462194.pdf
    • http://verekoxamokit.epizy.com/51651151038.pdf
    • https://uploads.strikinglycdn.com/files/5ae33ef7-6cf4-4f7f-9c7f-280f06056b7e/rudomodoloborafanide.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f415.bin
a8d2fc68d288fdbf15ac7b2f5c09753022367e8fbe2e8c14104177820075e539
pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 5804 bytes
font_01_sfnt_off000107f1.bin
3d47625106a1d48ece18d89ed466b1d66b3baeabbf74631727d87413ea40c95e
pdf-font-stream PDF embedded font (sfnt) at offset 0x107F1 10808 bytes