Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a7e71c72e92b3a…

MALICIOUS

PDF

1.63 MB Created: 2021-03-20 20:32:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81f92bad9d03a64a3de6ea7e4e7ecf0c SHA-1: 627b501faf65398772cd74d2516f5dffd548ccd4 SHA-256: 33a7e71c72e92b3a959023a52b6f0566f41db3658f3ae927f81d85e0ff24e0d8
166 Risk Score

Malware Insights

MITRE ATT&CK
T1539 Steal or Forge Credentials

The PDF document contains heuristics indicating it's a phishing lure, specifically requesting recovery secrets or private keys from the user. It also contains a lure to execute commands via copy-pasting into a shell. The embedded URL points to a domain associated with malicious activity, further supporting the phishing and credential recovery intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0055

Heuristics 6

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://jottigo.ru/wix?keyword=isc2+sscp+study+guide+pdf
    • https://cdn-cms.f-static.net/uploads/4486969/normal_60103e6e0b170.pdf
    • https://fetuxugov.weebly.com/uploads/1/3/4/6/134655394/4224e5eff.pdf
    • https://cdn-cms.f-static.net/uploads/4481275/normal_603448a3ef642.pdf
    • https://cdn.sqhk.co/kataduzoni/B4pPhgp/posajogatawetirip.pdf
    • https://cdn-cms.f-static.net/uploads/4415526/normal_602596b5ca97d.pdf
    • http://sdfsdfsdf.shaketorch.com/kopanamifotivozuwu.pdf
    • https://cdn.sqhk.co/xobupuwulawe/nhbkhdR/64858708607.pdf
    • https://mivixotagu.weebly.com/uploads/1/3/1/3/131384173/mogujuk-kelomutanineg.pdf
    • https://cdn-cms.f-static.net/uploads/4372972/normal_604f54a1515da.pdf
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/kifasepumobufazofa.pdf
    • https://cdn.sqhk.co/xekawiba/5N9jegd/arma_3_zombie_mod_2020.pdf
    • https://static.s123-cdn-static.com/uploads/4476268/normal_5feef92120fa0.pdf
    • https://fezuwarojeti.weebly.com/uploads/1/3/1/3/131383544/vowuwadiliri-borumunodo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jaxesabi/countif_function_in_excel_across_multiple_sheets.pdf
    • https://uploads.strikinglycdn.com/files/d90bdd87-b154-43e4-b217-b0dfe2a7a842/what_are_the_technical_questions_asked_in_interview_for_ece_students.pdf
    • http://mafojupovovod.rf.gd/can_kindle_paperwhite_battery_be_replaced.pdf
    • https://s3.amazonaws.com/lumixi/zasuxulixironob.pdf
    • https://uploads.strikinglycdn.com/files/ebfad4c7-fd43-477e-8b26-6d2226378d4d/49138270627.pdf
    • http://xupimegoroze.epizy.com/tamil_bible_dictionary_free.pdf
    • https://uploads.strikinglycdn.com/files/dc306b46-dd6c-4fea-92af-0cde9bc7a9d3/links_awakening_review_reddit.pdf
    • https://uploads.strikinglycdn.com/files/b956c253-91ee-4f98-90e5-144301786bcb/nelafisixerotixewimof.pdf
    • https://uploads.strikinglycdn.com/files/620fd4b3-9dc6-48c5-abf0-84e3bacb71fb/difidululidufeb.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0019ad8c.bin
90c8c2d8d4ee123e589433b49e7612f97a188c05cb3aeef0e0e47262bb58dd70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19AD8C 5156 bytes
font_01_sfnt_off0019bf53.bin
c39f153cf02b0c6a95e472374070b376f19f346d17830df15e6b41cb4c0cb154		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19BF53 13664 bytes
font_02_sfnt_off0019ec94.bin
d6f0d2c712a9045692733a59b6d57afe4462d8d3dca4016e6a89d0be585f12df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19EC94 16204 bytes

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