Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a505423e6ace99c…

MALICIOUS

PDF

80.2 KB Created: 2021-04-06 12:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 00ea59577e5f67b3db56a983bf910e74 SHA-1: ac86e9d4b20535530e0a9baca532fb6d35e405e0 SHA-256: 5a505423e6ace99c65d30658fcdf23396b28a3c5a39027d2a826554b80f69146
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=importance+of+value+education+in+our+life+wikipedia PDF link annotation
    • http://899themes-demo.ru/37243550274l4wby.pdfIn PDF document text
    • http://relodifalixogo.scienceontheweb.net/33218198566.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/hcjgifo/45061926249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489983/normal_5fde59449ae3a.pdfIn PDF document text
    • http://bumosid.getenjoyment.net/nafokebajajomipusakasik.pdfIn PDF document text
    • https://cdn.sqhk.co/xerolunem/51xgcij/74042659646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463275/normal_5fd9aed2e5400.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385011/normal_5fddc12598e7d.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/gc6ibgg/44064678128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404488/normal_5fea42b4b3558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447467/normal_603a86c065292.pdfIn PDF document text
    • http://the-glow.ru/levizifapusosoliwizoful67kgi.pdfIn PDF document text
    • http://jurojegame.getenjoyment.net/lorivezixolipazenuwizun.pdfIn PDF document text
    • http://maxist.ru/xelinuwozojawetozazadikipdgdxk.pdfIn PDF document text
    • http://nonretloli.site/how_to_pair_jlab_bluetooth_headphones_to_iphone8rs49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruzakema.onlinewebshop.net/how_to_make_alkaline_water_at_home.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/xonaxiwozusunobabemabiwoj.pdfIn PDF document text
    • https://13dbc848-c95e-4197-a439-3ae2050b6ee2.filesusr.com/ugd/46bbe5_f73867d993954ee88dd6466930ff32b6.pdf?index=trueIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_d88d0c2030d2499db3705d09a87934e0.pdf?index=trueIn PDF document text
    • https://535f918c-e50e-4760-9dbe-4b22a9cc1357.filesusr.com/ugd/65883d_f1fc5d052b3040db9216d9257b797cd9.pdf?index=trueIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_9d0f9882c0254c9dbb0f7e0536b02b4a.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB37 5276 bytes
SHA-256: a6c3fbac8229f65e2dda5d0e3c6da8564b9b035645d1489e51c78d5c76a7583c
font_01_sfnt_off00010d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D26 11120 bytes
SHA-256: 32369d58a5995c231d666ec9ba1ee8805537424c5830400ca4b4558c57e16709

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