Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3697919d7e4e4f4…

MALICIOUS

PDF

83.4 KB Created: 2021-02-15 01:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0e6bea86983ee1bf9a4afb206857d509 SHA-1: 6e0c6ce39ce0cec3b33bece1df1e7844f98f396a SHA-256: e3697919d7e4e4f40344de6fa89390f6c7b92ed632a5cd490082efc43bcbd27e
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically identified as a link farm on disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a spearphishing attachment, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://bologen.ru/123?utm_term=litwo+ojczyzno+moja+dlaczego+litwa PDF link annotation
    • https://supipujijasof.weebly.com/uploads/1/3/0/7/130739476/sowuluma.pdfIn PDF document text
    • http://vinnipoh.fun/ge_breaker_panel_label_templatea094j.pdfIn PDF document text
    • http://tvoyoproc.fun/pabozepelagemubeluj7613x.pdfIn PDF document text
    • http://bankrot-biznes.ru/army_game_for_pc_windows_7rhn1g.pdfIn PDF document text
    • http://menformula.xyz/44615047015e2iva.pdfIn PDF document text
    • https://telozigigozato.weebly.com/uploads/1/3/4/3/134310186/1b02ad3f8.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/jePhgjf/78412214937.pdfIn PDF document text
    • https://gebekogekikak.weebly.com/uploads/1/3/4/6/134694855/bimakojiru-mupol-xukap.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwilaj/ieWdhcY/14881221429.pdfIn PDF document text
    • http://cozyplacefor.rest/is_toasting_bread_a_chemical_changekzoqf.pdfIn PDF document text
    • http://polnews.xyz/youtube_dance_music_90s_workoutxypa9.pdfIn PDF document text
    • https://guwawafike.weebly.com/uploads/1/3/5/3/135338161/28f61010fba190.pdfIn PDF document text
    • https://vukojudal.weebly.com/uploads/1/3/5/3/135317211/1c5821ca376e48.pdfIn PDF document text
    • https://rovewavulitomu.weebly.com/uploads/1/3/0/8/130873995/3de9d9ae73.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/banula/73095298060.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/bachelor_eid_natok_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/guocoland_singapore_annual_report.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 5248 bytes
SHA-256: bdba4911b33634f20e8cf126188ed1654c57779744de495e13545d27a2f7a7cc
font_01_sfnt_off000113f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F5 14384 bytes
SHA-256: f8e679f8a12dedfb6ba30854bf62cdb9333b27f833cb6acda1f43c27ae88d378

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