Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e6a7bbbf792de2…

MALICIOUS

PDF

82.8 KB Created: 2021-05-25 05:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: dd6567141e22d2350fec08e35bc39b14 SHA-1: ecc6c8849d4e3ece40ce3a4ded8ac9a08b9a7461 SHA-256: 88e6a7bbbf792de20ae492584bc029157af52db17ab71323820609a389a9ef83
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The embedded URLs and the document body, though heavily obfuscated, point towards a lure related to 'colours of the wind piano sheet music free pdf', likely to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/strik?utm_term=colours+of+the+wind+piano+sheet+music+free+pdf PDF link annotation
    • https://tidijesugeji.weebly.com/uploads/1/3/4/7/134764535/levogupexuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486566/normal_6061f18bad568.pdfIn PDF document text
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/0cf0cbc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428083/normal_5fd98f9bcad51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485004/normal_604af695e7ad9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444623/normal_5ff28004522e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462096/normal_5ff771e47a71f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419826/normal_6002565a94af2.pdfIn PDF document text
    • https://kodabovoxalomas.weebly.com/uploads/1/3/5/3/135340354/bifopavapuwonewixef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_6067668f369a7.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/719d600f4d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484818/normal_5fded8fc62ada.pdfIn PDF document text
    • https://voxesisa.weebly.com/uploads/1/3/4/3/134349259/529c0ef.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/c0bc07c63ceb525.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/a8f6c725-3291-446c-96e8-c972d5bb41c9/anthem_chapter_1_reading_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb5c7df-964b-46ce-bd99-22491e15b27a/jepovaziliramativ.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c4e9ced-78ed-4d92-93d8-9f882919acc8/beatles_sheet_music_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b382b0da-e6e9-4cce-b661-bfcf99eabd74/how_to_reset_a_motorola_droid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/017b7480-a2d1-4919-a4d1-dab1130fff51/91473553255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd76ec83-df1a-489a-b959-2c303fffbb71/devetukokurujarawib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d29b467-3913-4d7b-b97d-a0e770711b91/28911616717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0797afbe-a0cf-4db7-803d-cc9365083bad/55818699964.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69B 5392 bytes
SHA-256: 87ab72187a7b52f1933154ab62e1a113f1f0e80473e53e656fd288985024c37f
font_01_sfnt_off000108d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D9 11180 bytes
SHA-256: 56e06bc468f5436e2710054acc9b99cf67b1f8734f5e9c2d84dfafeeaab79bdc
font_02_sfnt_off00012eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EED 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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