Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f91ffbc1486c0eb…

MALICIOUS

PDF

83.7 KB Created: 2021-04-03 06:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c6ac36b997e547d99ad22681e0b84cd SHA-1: 97479824a973423ce50c6d07083df6343252927c SHA-256: 1f91ffbc1486c0eb89fbad28f2283fe28c008e2a67f1c881d4b162a696223624
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains embedded URLs that likely serve as phishing lures, directing users to external sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, indicating a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/award?keyword=illicit+financial+flows+from+africa+pdf
    • http://extrameets.fun/what_to_order_at_jersey_mikesmer4e.pdf
    • https://cdn.sqhk.co/tezizejaropu/adtjjjQ/jufufanezakadomifubovuxir.pdf
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5fef52db622d2.pdf
    • https://cdn.sqhk.co/janonaset/bigcrVr/44897299047.pdf
    • http://drovazvenigorod.ru/dragon_ball_z_stick_fight_animationl74hl.pdf
    • http://ideaita.fun/how_to_adjust_time_on_armitron_wr330ftcsf3k.pdf
    • https://cdn.sqhk.co/tirazirevemu/ifnhdhb/dream_hotel_nightclub_nyc.pdf
    • https://cdn-cms.f-static.net/uploads/4384836/normal_6025dc615ee1d.pdf
    • https://cdn.sqhk.co/dibirolinu/gikdhcX/madasexowakuxuxugap.pdf
    • https://cdn-cms.f-static.net/uploads/4413866/normal_5fdb19bde1ec9.pdf
    • http://gtmedis.com/10_english_2_answer_key_2019kj2j2.pdf
    • http://lishop.site/how_to_fix_my_att_router2xuhu.pdf
    • https://cdn.sqhk.co/masamiwe/idSzdeX/try_not_to_laugh_challenge_markiplier_15.pdf
    • https://cdn-cms.f-static.net/uploads/4529780/normal_60239f3fe4979.pdf
    • https://cdn-cms.f-static.net/uploads/4473379/normal_605c093f29a35.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/32b17a2c-b186-40a7-9c90-ac7dd3d28db6/malowibafulonikukavafetex.pdf
    • https://uploads.strikinglycdn.com/files/9ff458de-ac83-4ba9-b06b-a1bf1b4bb981/who_played_romeo_and_juliet_in_1968.pdf
    • https://uploads.strikinglycdn.com/files/4cd6aa09-ad7c-402e-88e6-bd8e79f60d00/gufazexawuv.pdf
    • https://s3.amazonaws.com/juliziwojatige/minecraft_free_mac_os.pdf
    • https://s3.amazonaws.com/pasawexawinogad/how_to_play_different_drum_beats.pdf
    • https://uploads.strikinglycdn.com/files/14eefb43-50bb-4e14-ae19-d4f22f5578a8/how_much_is_a_cdl_renewal_in_ohio.pdf
    • https://uploads.strikinglycdn.com/files/0ee25446-bbc1-4b77-9c46-60a7e87be4f9/how_to_change_the_belt_on_a_dyson_ball_vacuum.pdf
    • https://s3.amazonaws.com/tikoweravisixu/possessive_apostrophe_worksheet_with_answers.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_off00010735.bin
4b437827545ba569a9a5e1c112cb777e612538b24e6a8c8555b7823e80bbe2e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10735 5332 bytes
font_01_sfnt_off00011954.bin
970b1663231e3c33ff72c7d8c8c99dd7604c84a8050fd78897d9cfda1833ec64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11954 11468 bytes

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