Malicious PDF — malware analysis report

Static analysis result for SHA-256 86153452de1d7cd1…

MALICIOUS

PDF

81.4 KB Created: 2021-03-26 07:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f126a77fb323b25ac0a5c56e50aa4741 SHA-1: b8b9ad79319ff98d9d86c93559dfabfe369495f1 SHA-256: 86153452de1d7cd1791bd3dd1b167297ccea523c7751b27a4ed9045acf4cd6a4
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'golowaki.ru', which is suspicious. The document body, though heavily obfuscated, suggests a lure related to 'shapes 3d worksheets'. The presence of multiple unknown URLs further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://golowaki.ru/123?utm_term=shapes+3d+worksheets
    • http://kizijele.iblogger.org/94772275198.pdf
    • http://usacreditcheck.info/busevesaga2a1di.pdf
    • http://wifefavowe.iblogger.org/atheros_ar5007eg_linux_driver.pdf
    • http://thesimplycompleteseries.com/tebeparab62a5q.pdf
    • http://fly-drive.online/79551431722ipxqf.pdf
    • http://cuzinfo.ru/spirit_of_python_jentezen_franklin_dvdaa93g.pdf
    • http://armlur.space/how_to_conclude_an_expository_essay49srv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fukepez/barre_chord_fret_chart.pdf
    • https://s3.amazonaws.com/najipavez/free_angular_admin_template.pdf
    • https://s3.amazonaws.com/wukevirenesu/roald_dahl_15_books_box_set_collection.pdf
    • http://pejenusiloxo.rf.gd/konubusotefiboxajumuxira.pdf
    • https://s3.amazonaws.com/jezaxojipevu/roja_movie_in_telugu_songs_free.pdf
    • https://s3.amazonaws.com/sinadi/cica_care_silicone_gel_sheet_sizes.pdf
    • https://s3.amazonaws.com/bevarolimesale/dudewenorabugux.pdf
    • https://s3.amazonaws.com/xumakomowi/95621959253.pdf
    • https://s3.amazonaws.com/boduxatavepe/choreiform_movements_radiology.pdf
    • https://s3.amazonaws.com/voropa/kepner_tregoe_template.pdf
    • http://bitetam.epizy.com/what_is_the_best_app_for_college_algebra.pdf
    • https://s3.amazonaws.com/dorobukasawituw/baritone_uke_sheet_music.pdf
    • https://s3.amazonaws.com/jakujakula/53516750174.pdf
    • https://s3.amazonaws.com/wajibile/piriloge.pdf
    • https://s3.amazonaws.com/divelatoxa/zedegisakofelim.pdf
    • https://s3.amazonaws.com/mukut/19759500903.pdf
    • http://jategemi.epizy.com/wojadujozo.pdf
    • https://s3.amazonaws.com/kofabube/19267495827.pdf
    • https://s3.amazonaws.com/wibadinavosunom/saseniloxegit.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_off000102e9.bin
1f6af1c5760c1a5674b7feb67e4428ebd0af4b483baa19962e26c4a767d6f4bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 5436 bytes
font_01_sfnt_off0001156f.bin
697cc18a74e22de97c70a82b567ed4b2557a384fdbe1f75623888eb438ad7177
pdf-font-stream PDF embedded font (sfnt) at offset 0x1156F 10136 bytes