Malicious PDF — malware analysis report

Static analysis result for SHA-256 f211c08307b9f2a9…

MALICIOUS

PDF

76.6 KB Created: 2021-04-01 11:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7bd97ae622cc84e407c39b8c94af4376 SHA-1: 564bd5b5929bc4755e7c3f233a1b2f9049c41f2a SHA-256: f211c08307b9f2a936c6558017585bf0050139888f41366f13ddf993cbaacbde
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious URL, and ClamAV detected it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'sheet music pdf'. The presence of external URIs indicates an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/award?keyword=one+o+clock+jump+sheet+music+pdf PDF link annotation
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/naforarowur_sokipexip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458623/normal_5fee64a2be978.pdfIn PDF document text
    • https://ronikirene.weebly.com/uploads/1/3/5/3/135393313/eb8aba374558f4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392463/normal_5ffdc630d74b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484820/normal_6014f2b594ec8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369788/normal_5fc76fd4c8776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487935/normal_605d991484147.pdfIn PDF document text
    • https://vusujotogeza.weebly.com/uploads/1/3/4/6/134653296/nudapizenatakep-jevudoto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409395/normal_5ff4299043bc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_60601ea4dd1bc.pdfIn PDF document text
    • https://ramasiwo.weebly.com/uploads/1/3/5/3/135390431/wubuzuzura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473384/normal_60127974a2893.pdfIn PDF document text
    • https://zupalopozaguri.weebly.com/uploads/1/3/2/3/132302876/buliwafozivu.pdfIn PDF document text
    • http://sorujod.22web.org/68819379318.pdfIn PDF document text
    • http://nefovirarud.iblogger.org/65664402296.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rajamuviw.epizy.com/sadness_and_sorrow_piano_partitura.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/38110290635.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/gaucher_disease_management_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/sipilumafomatezimapidu.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/musical_note_symbol_emoji.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/do_roombas_work_well_on_carpet.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/tikukufuto.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_off0000ed60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED60 5256 bytes
SHA-256: e87441477fe57f97bfe5d87bdd2d15162a313366d38b3fd8a541a8313f392e5c
font_01_sfnt_off0000ff29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF29 11392 bytes
SHA-256: 6b6d8ce759b1e3ce099b0d84af8b34147cfa092b3f25a73ab6db3c58fac30c3c

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