Malicious PDF — malware analysis report

Static analysis result for SHA-256 880c7c834c429402…

MALICIOUS

PDF

81.0 KB Created: 2020-12-06 19:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ec5235ca6ea405af67f2b523bb6ef33f SHA-1: 7d1e5aa0d798a3f085f533c3c1668ed4a3842f62 SHA-256: 880c7c834c429402b8b96c089c19cf84e98d82770c72af82f5585bb68c5f9b33
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' suggest the document is designed to lure users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=trig+function+powerpoint In PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/2d35a5.pdfIn PDF document text
    • https://wifivufadabigo.weebly.com/uploads/1/3/4/5/134522009/mufigorebijigikidor.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/poxut.pdfIn PDF document text
    • https://jivelalowu.weebly.com/uploads/1/3/4/6/134603563/60359ef.pdfIn PDF document text
    • https://gesurori.weebly.com/uploads/1/3/4/3/134353915/4331387.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/f98dcb8a.pdfIn PDF document text
    • https://kujuxase.weebly.com/uploads/1/3/4/5/134584075/7947922.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/29eb905d-4fe4-4cb4-8c8a-142e950125ec/little_witch_academia_wallpaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b808d8-17d4-4e70-9d55-65911fd931f2/xakamorutus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eb456b97992eb55c2a22/t/5fc4ff0e9ee0f32b87f0aa14/1606745871033/79075045161.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd9b8ef7301f8b108504/t/5fcb772d6e74d26c6fff6691/1607169837938/64723076996.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d4752bbd7406580625ec/t/5fc1586a5147b14804659f40/1606506604088/segments_and_midpoints_worksheet_answers_a2-4.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C5 2492 bytes
SHA-256: 497139ebb659d82e549ba386f67653fc288eb964761fa794390a960dbac312f5
font_01_sfnt_off0000f49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49C 4684 bytes
SHA-256: 774582caf5c57ec884a333269c85df6640bc1761560db2f8d2dd57f4c798315e
font_02_sfnt_off000104a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A8 10648 bytes
SHA-256: 90596332b5c4f80acf76e35d03e8d633efa0bb19a008297705b47bfa13d8af6c
font_03_sfnt_off00012900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12900 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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