Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff52a2ed3c2cad21…

MALICIOUS

PDF

78.3 KB Created: 2021-06-11 11:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af02cc35dd6772507f4f5c18a9dca3f0 SHA-1: ea13ba720260a3861417cca504f7ca284033bc06 SHA-256: ff52a2ed3c2cad214a492f1187e2d430509715260f4d299d4719a763d91372bf
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it is a payment redirection lure, suggesting a business email compromise pattern. The embedded URL likely leads to a phishing or credential harvesting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://inwebjor.ru/pbw?utm_term=use+the+substitution+method+to+solve+the+system+of+equations
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://liguduper.pbworks.com/f/9637910522.pdf
    • http://xivoxibuza.pbworks.com/f/xiaomi_mi_mijia_laser_projector_review.pdf
    • http://lezakoliz.pbworks.com/f/carranza_12th_edition_download.pdf
    • https://uploads.strikinglycdn.com/files/b38332d0-e397-4a0c-b974-02b39e1f8859/58520186495.pdf
    • http://bowawesup.pbworks.com/f/matematiin_gnlk_hayatta_kullanmlar.pdf
    • https://uploads.strikinglycdn.com/files/e6f4b371-32ff-4091-be92-eb4ce1eefc35/tojem.pdf
    • https://uploads.strikinglycdn.com/files/11dd19c7-7088-4917-835e-291ffe7052db/gatezadopunaj.pdf
    • http://zegugas.pbworks.com/w/file/fetch/144427803/o_que_significa_cosmologia_e_cosmogonia.pdf
    • https://uploads.strikinglycdn.com/files/8592ca1e-0adc-4fd1-a027-ce18b01c7414/beats_studio_wireless_2_noise_cancelling.pdf
    • https://uploads.strikinglycdn.com/files/05c3fd1d-d7e6-44da-a481-4dceee56f2a9/37030374469.pdf
    • http://zuvuzut.pbworks.com/f/libotemuwibofopizamimuba.pdf
    • https://uploads.strikinglycdn.com/files/9477fdcb-8ef2-4359-8995-3efec4b7d53b/49026396928.pdf
    • https://uploads.strikinglycdn.com/files/4798f008-eb85-49f4-a434-cd8f84cf773b/50033986305.pdf
    • http://nugurafuge.pbworks.com/f/best_free_sewing_patterns.pdf
    • http://gemometis.pbworks.com/w/file/fetch/144512961/32299177067.pdf
    • http://xosezoranad.pbworks.com/f/47012978684.pdf
    • https://uploads.strikinglycdn.com/files/79266c22-cd89-454d-b0fd-dc19cf208428/fishing_rigs_for_crappie.pdf
    • http://xeninexiruvo.pbworks.com/w/file/fetch/144832809/developing_chinese_intermediate_comprehensive_course_free_download.pdf
    • http://bomasasawavi.pbworks.com/f/konefibizinadunukot.pdf
    • http://moxulolo.pbworks.com/w/file/fetch/144682779/23266323597.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e455.bin
598e5f1e2231905cb5b0cce1edb125fcd26f950dcbf509ee83e9d1a127f6a87a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 5352 bytes
font_01_sfnt_off0000f65e.bin
9a49ecf91905a123a649ee5a54c163609a10330cfff7b53677b28cb943596865		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF65E 12276 bytes
font_02_sfnt_off00011d4b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4B 4324 bytes

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