Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fec7f53377be4fe…

MALICIOUS

PDF

103.4 KB Created: 2020-12-30 14:11:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7dd8d5fb12ad476fa7a11bec901c82b8 SHA-1: dbcadd1df49987574f2f47a505eaa7cb37bda5c1 SHA-256: 7fec7f53377be4fe39ad2dde38bff084561f00a00e2f3d74e78f2c83b51c42a9
104 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'smart steps child care assistance' and 'action required within 24 hours', reinforcing the phishing pretext. The embedded URL is the primary indicator of a malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffnew.ru/strik?utm_term=smart+steps+child+care+assistance+tn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459062/normal_5fd7bbf07a09c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5fd30d86524f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454430/normal_5fe23bb39c7af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f89333cf12b2.pdfIn PDF document text
    • https://cdn.sqhk.co/wikikifigas/OT0haie/drumstick_ice_cream_cone_tips.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c863e54b-ab43-4ab2-85f3-65073e9d609c/73553561362.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/barfi_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/88646786345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f4ff29-2759-435f-8b7b-d18d3fc6cd83/top_games.com_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd74693-d672-4589-9631-bfd1dea53e82/prodajem_stolarski_freezer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23f5b7fe-ef96-4d36-a5e9-2c93ec91d744/civil_war_battles_in_western_tennessee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6f6bb6-dbce-4866-ad55-d5e609169594/45945771056.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/sasebasazekegedavawi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13648 5096 bytes
SHA-256: 88a7562dfd99ec0efcff199b2e73fbabe3ab55521f996b353eba9724cd29dc4e
font_01_sfnt_off0001475a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1475A 11040 bytes
SHA-256: df0c5b56fff0301a41de6d9abd33216a1b3e56578d2481eae0deb2d8240bfb12
font_02_sfnt_off00016d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D3E 16076 bytes
SHA-256: 20dc835fdb26e5c8b2bf371a74de3f1f2251d0d540cd54084ecb3d27d8cc4587
font_03_sfnt_off000181e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181E3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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