Malicious PDF — malware analysis report

Static analysis result for SHA-256 599c835d92c16ce0…

MALICIOUS

PDF

83.7 KB Created: 2021-04-27 23:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df94da0f1490d7fea31dbcbd8f75197b SHA-1: 478c6fc1dcff7e6baec2e3c141d1026eae693134 SHA-256: 599c835d92c16ce0fb122d1a336b544aa80786f1c8176a6e75556c911467c0b1
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the ClamAV detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/strik?utm_term=vizio+e550i-b2+weight
    • http://myirn.icu/the_odyssey_book_9_short_summaryqktjf.pdf
    • http://delaem-sami.online/magasedalewobnjf5y.pdf
    • http://blockingscenery.com/lufuditamarenausal6.pdf
    • https://xudujebu.weebly.com/uploads/1/3/6/0/136090205/7532c529ebb880b.pdf
    • http://usene.xyz/their_eyes_were_watching_god_pageseysi3.pdf
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/3319361.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jesidofefe/the_vegetarian_butcher_stock.pdf
    • https://s3.amazonaws.com/pegozegi/what_are_some_metaphors_in_the_tell_tale_heart.pdf
    • http://nizudub.rf.gd/54359374111.pdf
    • https://uploads.strikinglycdn.com/files/78dc1eba-c1c1-4fbf-98dc-28a98d771fb4/bose_sounddock_bluetooth_adapter_lightning.pdf
    • http://lofatis.epizy.com/16884912757.pdf
    • http://simufuravaged.rf.gd/13091882173.pdf
    • https://uploads.strikinglycdn.com/files/9c5e25a5-cdd3-4cc4-ad16-2801b565688d/the_end_of_evangelion_ending_explained_reddit.pdf
    • http://merivitewije.rf.gd/what_are_the_essential_characteristics_of_feudal_society.pdf
    • https://uploads.strikinglycdn.com/files/eb3b1aa2-bbe5-4673-8752-188e0980f776/georgia_driving_permit_practice_test.pdf
    • https://uploads.strikinglycdn.com/files/64aa4bad-f2bb-48d9-9cf2-5b98135e02c1/19576370853.pdf
    • http://pevidevile.epizy.com/hangout_app_for_pc_free.pdf
    • http://gasunerumep.rf.gd/bouddhisme_theravada.pdf
    • http://zujuguj.epizy.com/kobifuwinoteleporowaxo.pdf
    • https://s3.amazonaws.com/kopisigapub/hada_labo_3d_sheet_mask.pdf
    • https://uploads.strikinglycdn.com/files/85c7fcf4-5c7f-4545-b594-8e16c9e56eed/el_coronado_restaurant.pdf
    • https://s3.amazonaws.com/gudukupir/jazz_jingle_bells_piano_sheet_music.pdf
    • http://guwibigebozodeg.rf.gd/safaworo.pdf
    • https://s3.amazonaws.com/xisakazelelinim/15142045448.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_off000106f7.bin
35ccada5535347a3cfc6667e4ed8381ae65460be42ebfee5d9d1cf88e27c5bee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106F7 5108 bytes
font_01_sfnt_off0001188e.bin
a634f19991058baba2015b7214090332f96dd6152de2af4e8d9279188bf7da73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1188E 12136 bytes

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