Malicious PDF — malware analysis report

Static analysis result for SHA-256 792ebcdd902c4896…

MALICIOUS

PDF

84.2 KB Created: 2021-04-03 23:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfdaf9e90b8e3c9b5a2000a5bb0107ee SHA-1: d337cc04acbd47988441f6d3fb06cb6015fbe45d SHA-256: 792ebcdd902c48964546ac1e2d4d909ea062696a4c386bb6e73b06906444e88c
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to a product manual, aligning with common phishing tactics.

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://zajinet.ru/wix?keyword=vivitar+4+device+jumbo+universal+remote+manual
    • http://pofaduxiruk.getenjoyment.net/rearrange_pages_acrobat_reader_dc.pdf
    • http://meetsalle.xyz/pamuminulorerufi8cv2.pdf
    • http://boldly-grow.com/baby-g_bg169m-1d_black_resin_womens_watch4tl1o.pdf
    • http://cmbclientes.com/vofariwirifagowixorasg2c5e.pdf
    • http://sdek-24.cc/768906584080a2zj.pdf
    • http://pixell.store/cengage_physical_chemistry_freecztb7.pdf
    • http://mestorating.ru/18366840872liyqv.pdf
    • http://strapslap.online/turning_operation_on_lathe_machine_is_done_byrv6kl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/7bd4d83e-bf78-4786-a63c-9cc57918e0d8/k120_keyboard_not_working.pdf
    • https://uploads.strikinglycdn.com/files/8724e364-9ee7-403c-bb34-acf4d8cf3016/fovowogiwalovediwutexe.pdf
    • https://s3.amazonaws.com/wutezigojuxi/lonowetunidoboku.pdf
    • https://uploads.strikinglycdn.com/files/1b9914e9-cef9-44ea-b03d-d524d8bcd5e1/gusidobifizumadorad.pdf
    • https://uploads.strikinglycdn.com/files/7cfa06b9-d80a-485a-956c-4dce17e5b1f4/math_worksheet_for_kindergarten_3rd_class.pdf
    • https://s3.amazonaws.com/tutasujal/how_to_file_a_claim_for_a_lost_phone.pdf
    • https://s3.amazonaws.com/dowesitobuga/bavikolepipu.pdf
    • http://vowojuxibaxo.myartsonline.com/list_of_essential_nutrients.pdf
    • https://uploads.strikinglycdn.com/files/248df74d-a066-4a45-874c-55de961f0749/xajodotekulekusofigerupa.pdf
    • https://s3.amazonaws.com/tuxutedi/firing_someone_synonym.pdf
    • https://uploads.strikinglycdn.com/files/efcdce0d-82a2-4c1d-a21d-ff655b14367a/92887768910.pdf
    • https://uploads.strikinglycdn.com/files/a7f32c78-c370-4e13-af14-5f44fa5a691f/bodyweight_workout_routine_at_home.pdf
    • https://s3.amazonaws.com/gotitibekovi/congenital_hypothyroidism_european_guidelines.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_off0000fe18.bin
c40afa0bb41dd9c68cc568d364fcb20d0220351858dfe7f252fb2cfc519b0fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE18 5296 bytes
font_01_sfnt_off00011003.bin
73fd21b9c030a1c1e7f5f0b46cd568d16ae15991ffc9164a784f53e7ae26de3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11003 10756 bytes
font_02_sfnt_off000134d9.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134D9 4324 bytes

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