Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b08ba28d921ed9…

MALICIOUS

PDF

77.7 KB Created: 2021-04-02 07:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b376808bbb0ac4673ad036a5ad913a31 SHA-1: 7d980700928f7c1ebb165cb78b47ce1945b90ef9 SHA-256: d9b08ba28d921ed96aa3adc3ab63bcaeb74cc8dc7aff1e28d52f1bc7ac366fe2
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a phishing lure. ClamAV and ML classifiers strongly indicate maliciousness. The embedded URL, https://maypoin.ru/wix?keyword=beaks+of+finches+lab+answer+key, is likely part of a phishing campaign to trick users into downloading further malicious content. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/wix?keyword=beaks+of+finches+lab+answer+key
    • https://cdn.sqhk.co/kawonidoza/4UA2wPN/dry_ice_blaster_rental_seattle.pdf
    • https://cdn-cms.f-static.net/uploads/4465685/normal_602f84b55469d.pdf
    • https://cdn-cms.f-static.net/uploads/4459170/normal_604b847830284.pdf
    • https://cdn-cms.f-static.net/uploads/4457847/normal_605517bdbbfd1.pdf
    • https://cdn-cms.f-static.net/uploads/4487386/normal_6046fda0c2871.pdf
    • http://mattelipsticks.site/39367060584171mu.pdf
    • https://teduraxiwerul.weebly.com/uploads/1/3/2/6/132681384/eecee8767120dd1.pdf
    • https://puluzoxaxidu.weebly.com/uploads/1/3/2/6/132683087/genuritalo.pdf
    • https://cdn.sqhk.co/namemedoxake/jhDgeMw/one_punch_man_funko_pop_limited_edition.pdf
    • http://rcasino.info/norulupivagufarulikm0m1.pdf
    • https://cdn.sqhk.co/zisujidixa/vmgijer/why_is_my_migration_assistant_not_working.pdf
    • http://xviiivbgz.com/new_barbie_house_decoration_games3jose.pdf
    • http://azules.ru/rc_christian_songs_ringtonet3eet.pdf
    • https://vurigejowuzebad.weebly.com/uploads/1/3/3/9/133997249/dutovijejawikal.pdf
    • https://cdn-cms.f-static.net/uploads/4415525/normal_603bdfa96b1d1.pdf
    • http://testersairf.xyz/wall_street_journal_digital_subscription_multiple_devices76der.pdf
    • https://cdn.sqhk.co/puxolika/haSgjB3/wood_master_3d_printer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7722bba5-72ad-4d15-a72d-9ce9fbdcf1b5.filesusr.com/ugd/772ad5_b4ebabd6e16946bcad3ed70191da439e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/52e35072-fb5a-4b5b-8e8f-31e45575b423/cask_of_the_amontillado_theme_statement.pdf
    • https://uploads.strikinglycdn.com/files/59a3bbaf-e380-4fa6-9579-5d0594e3a05f/how_to_change_whirlpool_thermal_fuse.pdf
    • https://uploads.strikinglycdn.com/files/6545abfb-18fb-4224-88fe-5ca2b7df63e7/fonas.pdf
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_9d89b05bb45e465690dd2aebcbf63606.pdf?index=true
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_4fea14cdaf8840b3baba39d36dee742b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fe2b4ca9-66ba-40de-9d99-616dce8eea00/62476512881.pdf
    • https://uploads.strikinglycdn.com/files/bf5776b5-87b0-4d62-90fb-7502a07d859a/what_is_taylors_theorem_used_for.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_off0000ecb2.bin
f8c46ff8a53ba602f1f9798df0087ce597327247236b407b18c5ab07226948c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 5416 bytes
font_01_sfnt_off0000ff3a.bin
0fc8135360b9871907b1b4143a4eb7ce6feaa9a75e4dafa9968f0d8cf64de97a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 11992 bytes

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