Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6897e4c0295a30…

MALICIOUS

PDF

74.4 KB Created: 2021-03-25 23:29:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75645f776812d98ffba7d16bdd9cf081 SHA-1: 7b2c7c7e25002975f7f922e7c68524376b9f36e1 SHA-256: fe6897e4c0295a3053daae8620a05a911df9116178501aed23a39eb6ab43aa41
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to PDF documents, suggesting a link farm designed to attract traffic or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://golowaki.ru/award?keyword=che+guevara+books+in+bengali+pdf
    • https://voxipomawo.weebly.com/uploads/1/3/1/3/131379395/bc2f9d23ec691c7.pdf
    • https://lewagezu.weebly.com/uploads/1/3/4/3/134369469/556451.pdf
    • https://zeruxukekojumu.weebly.com/uploads/1/3/5/3/135345771/bidogufur-maxigix-sorivageja-xomulogowelo.pdf
    • https://vamawawu.weebly.com/uploads/1/3/0/8/130874524/wugekan.pdf
    • https://sagolofuba.weebly.com/uploads/1/3/4/8/134873879/9e38f0829.pdf
    • http://ogranicbio.space/dewalt_d55146_type_7_pressure_switchn0okq.pdf
    • http://rasprodavaika.ru/artist_malayalam_movie_songs_free1egbp.pdf
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/76874ea74720.pdf
    • http://beach-fruit.fun/50512922401e1kvk.pdf
    • https://cdn.sqhk.co/gixezovof/f4hgfjc/46915697430.pdf
    • https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdf
    • https://wunovolal.weebly.com/uploads/1/3/5/3/135311751/2435438.pdf
    • http://help-nanny.site/titans_cursefphnl.pdf
    • http://hdsamara.ru/241046320564pc8y.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rodigapigeta/gdb_cheat_sheet_stanford.pdf
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_56512529373745349affd6da0a8bf37b.pdf?index=true
    • https://s3.amazonaws.com/jedaxopopuko/egyptian_hieroglyphic_symbols_and_meanings.pdf
    • https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_fdd5cd3d9b604735859777cedbf395b4.pdf?index=true
    • https://s3.amazonaws.com/polexebuj/midland_75-822_channel_mod.pdf
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_ab073078c7ad4f73a7fb49f6e53b4a10.pdf?index=true
    • 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3f1.bin
879b85683460ff0a52bb8e3cdca1d5e5986dd9a42274b413d7f004e45ff1b40a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F1 5472 bytes
font_01_sfnt_off0000e681.bin
81b69a783763cf237c8ae92feef5fd038bf49125c757a588fc5516b9311a6877		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE681 5788 bytes
font_02_sfnt_off0000f94d.bin
6a71b3ad36715513ed74a5bf65ed54cf1c8b3ec3ebad964c9790c95731706377		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF94D 10524 bytes

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