Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f54a5d93d961fd…

MALICIOUS

PDF

75.3 KB Created: 2021-03-30 13:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2ccfcdb08d9a94d056a597cb053f3b0 SHA-1: 7a5f87120db34a712736f572be9b80aa40c911b8 SHA-256: e1f54a5d93d961fd7b8cfcfaacf6b2e4f3efef787fdf17b35413bda14bb51389
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'mezovuduw.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to 'Acls manual pdf aha', indicating a lure to disguise the malicious intent. The presence of embedded URLs and the overall context strongly suggest a phishing attack aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/award?keyword=acls+manual+pdf+aha
    • http://storeeu.info/zavunovopuvaziviq6a.pdf
    • https://cdn.sqhk.co/lagusive/fhhjdjg/test_retro_city_rampage_dx_switch.pdf
    • https://cdn.sqhk.co/xugavizira/G8Ujiic/top_100_movies_imdb_2015.pdf
    • http://jinevul.mygamesonline.org/download_software_to_word_untuk_pc.pdf
    • https://cdn.sqhk.co/rumunefa/tgekhaZ/60255372809.pdf
    • https://cdn.sqhk.co/derubejes/dkjhsPx/free_bunny_live_mod.pdf
    • http://dreabling.online/461959371180xrxh.pdf
    • http://ionatr.space/21000108136zy0k9.pdf
    • http://raftgjgr.space/zuvokibf2mx.pdf
    • http://opencabinets.xyz/what_are_the_10_most_common_fears_society_hassaou8.pdf
    • http://help-violation.com/rupawagazope9c03f.pdf
    • https://cdn.sqhk.co/karapenakozi/g3rGcWE/rollercoaster_rush_apk_download.pdf
    • https://cdn.sqhk.co/nugizape/bjh4Dft/fibusadim.pdf
    • http://liketsven.xyz/68357723419tfawd.pdf
    • https://cdn.sqhk.co/nobixapo/kSjcXia/vozodap.pdf
    • https://cdn.sqhk.co/kibedutej/eAyhhhg/rokobuzudenedigusurotol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rikolesafuwofar/conformational_isomers_in_organic_chemistry.pdf
    • https://s3.amazonaws.com/levumoduf/consumer_report_ratings_on_washing_machines.pdf
    • http://juludiripo.myartsonline.com/the_servant_as_leader_robert_greenleaf.pdf
    • http://gipebevu.atwebpages.com/how_much_do_detectives_get_paid_nz.pdf
    • http://bujijawuta.atwebpages.com/mugofazodefezaxilizixu.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_off0000e888.bin
5bfbc9f6698dfa47fec2fb013efe1479316b331ff4657be9d290dbaf5a8c11d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE888 5288 bytes
font_01_sfnt_off0000fa65.bin
0af9ce6aadc12dae34780bd87f02b87fda908f4fec1ed95c1ab29e3fe400f892
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA65 10952 bytes