Malicious PDF — malware analysis report

Static analysis result for SHA-256 82962b80e180abaf…

MALICIOUS

PDF

82.2 KB Created: 2021-02-18 21:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 300ec4657138af3e67e0d3f79017b4e8 SHA-1: 5f2c7b3b88e21334268f36d0e8979997045a1446 SHA-256: 82962b80e180abaf14290372b84ec032357439f0124c03e4bd2a81782ae4074e
116 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains embedded URLs and a heuristic firing indicating a callback phishing phone lure. While no scripts were directly extracted, the presence of embedded URLs and the phishing lure suggest an attempt to trick the user into interacting with malicious infrastructure, likely for financial fraud or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=is+jitterbug+phone+any+good PDF link annotation
    • https://cdn.sqhk.co/butexuvokufo/eAnfeZl/csr_classics_hack_apk_download.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/android_root_software_pc62mop.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/igUgiji/flying_motorcycle_simulator_apk.pdfIn PDF document text
    • http://tophomework.space/tribles_beltsville_marylandwxx70.pdfIn PDF document text
    • http://nefuzixitelu.iblogger.org/casanova_2005_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/uijjaH7/kugosegaze.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/zgAOWjb/the_island_castaway_lost_world_3_free_download.pdfIn PDF document text
    • http://viewcreditscore.info/peligumogdnj4.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/kid5jee/helix_jump_ipad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/lugedisejiba.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/physiology_book_in_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/latest_windows_10_version_1803.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/76969144053.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/banner_vector_photoshop.pdfIn PDF document text
    • http://desetezovadu.epizy.com/forensic_files_frozen_evidence_worksheet_answers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10278 5444 bytes
SHA-256: 4917f4490949d07e1061809f6a3add4f23765df3fc4656ae453ca656b0911993
font_01_sfnt_off000114f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F9 11528 bytes
SHA-256: 5eecd88780c9033821fcd0de9eb026ecde6f1b952d014eaf8dcb676b0f8da0e3

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