Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ca9410b225fa7e…

MALICIOUS

PDF

95.8 KB Created: 2020-12-26 15:05:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1d95395f2157338a2b1e3be7a7970de6 SHA-1: 2f7d16d2a8c551ee15b911ca1050d41ae4820616 SHA-256: 82ca9410b225fa7e4736875f53b44f39957877f6f9f692e9caa7860a1a0a70a6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to the embedded URL's query parameter, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=hoop+basketball+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387922/normal_5f98fe09cf739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f906c8feab93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490132/normal_5fd9f5cd631c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466165/normal_5fb50c42e63a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445107/normal_5f9d17f1a07da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375361/normal_5faa0e158fd63.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c90b2a-02bd-4b3f-8ae5-79a34929f768/oral_and_practical_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0164634e-b97c-4374-a21b-743fa26b38f9/no_es_lo_mismo_chistes_blancos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76523340-e2b4-436a-8128-8cf1c3fe6f44/super_subnetting_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/fajufokisuruduroti.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/46883041903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9b303e0-5b44-4925-8125-783c9e04abd4/makeover_salon_games_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c49ef48-1f48-4f9f-9e62-6b296637e40d/vubevexam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd887eb0-2264-4be9-9675-3f86a5390382/what_is_a_cultive_conclusion.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/amines_chapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c29e3173-17d0-4783-a117-1d09873d9a24/41332541922.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 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD54 3232 bytes
SHA-256: a6c5beab8d966601ab822571871ab4d24cba18a4009de386b0f7144c2f65c617
font_01_sfnt_off0000e8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EB 5208 bytes
SHA-256: 1575c48b294c3c1fd7f085b131e1214233e1427a2598a034a89ed29e824c9ac7
font_02_sfnt_off0000fa90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA90 2656 bytes
SHA-256: c206ac4eca120f096112d408dff6b33a2f721090936d80486df636e1cd240fde
font_03_sfnt_off00010596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10596 2328 bytes
SHA-256: 3702365b3034b9d7945da23b991b5e2ac3f8bb06d1ba3be7e5ba1b5d8dd48c9f
font_04_sfnt_off0001104d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104D 2108 bytes
SHA-256: e66bd646ff29f48b94a898642357a1d5295b77faffa0bd70eb77acb4aebc9a97
font_05_sfnt_off00011a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A24 15408 bytes
SHA-256: a0f17ee96552f04fbab789fde5c3bb0fa85e82f669e26efe19f773895063fb52
font_06_sfnt_off000147e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147E9 18048 bytes
SHA-256: 276be3177e3f8ac4cdb58ef77efa47c6cf173ed250a8292ca099f5569cd24f6b
font_07_sfnt_off000163e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163E2 2644 bytes
SHA-256: 3294ae4e72832d4672e68b804b1489921f69fbc885b0f93fb3beac3ea9f25642

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