Malicious PDF — malware analysis report

Static analysis result for SHA-256 08877a6ac570602b…

MALICIOUS

PDF

152.7 KB Created: 2021-05-13 12:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 628c8b2813c645e63e9a92e96a214a78 SHA-1: c1f245cb5f6fdd429f196d8bcbf7455a6b0efc73 SHA-256: 08877a6ac570602b0ab4eb9c8068011aa8e046eb1ed315984a3dded7c5ad6663
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a tactic to obscure the true destination by using multiple redirectors and disposable domains. No scripts were extracted, but the presence of many external URIs strongly suggests the document's purpose is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=yamaha+rx-v677+manual+pdf PDF link annotation
    • https://vavapeta.weebly.com/uploads/1/3/4/8/134848771/poginowujapina.pdfIn PDF document text
    • https://cdn.sqhk.co/pabopimi/cu8eicF/jeluxunono.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/KK5jdgd/fruit_cut_3d_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/dNghhii/nostalgia_critic_the_wall_album.pdfIn PDF document text
    • http://pro-komp-master.website/modosusagazizodorejer45mgb.pdfIn PDF document text
    • http://kolekewoni.mywebcommunity.org/volume_and_surface_area_of_3d_shapes.pdfIn PDF document text
    • https://kajizifobizixa.weebly.com/uploads/1/3/3/9/133997117/eec8325d.pdfIn PDF document text
    • https://sopoxovolofu.weebly.com/uploads/1/3/4/5/134509961/c442c79eef052.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/dipubad-kasufuwepipug.pdfIn PDF document text
    • https://cdn.sqhk.co/nebemina/hdG0ggf/sibogomopijokotogazi.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/rujdcvw/60868439378.pdfIn PDF document text
    • https://kifajiziwezu.weebly.com/uploads/1/3/2/7/132740821/2833776.pdfIn PDF document text
    • http://begetus11ppz.xyz/libro_los_cinco_lenguajes_del_amor_gary_chapmanm2ddy.pdfIn PDF document text
    • http://xubajur.mygamesonline.org/6388509735.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/4120d3a6-b6ba-4d96-85af-f2e1ae4d0f5f/kadexokux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe37a8eb-8c07-48b0-856a-b7474c956181/whirlpool_dishwasher_user.pdfIn PDF document text
    • http://zezofakarol.myartsonline.com/55915048508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e89cac-a1ae-462d-95a5-5aa4cbfe8614/how_do_i_get_an_api_certification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6148891f-6dcc-4429-80a3-27d269dcc9d8/75320969994.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20DA4 4984 bytes
SHA-256: 2857342cd7fec0d515d7f8b1e53fd603b2b5fc9ed8b5e48578192d40e4218d01
font_01_sfnt_off00021e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21E6C 12436 bytes
SHA-256: 9021b2269fac7450dde90f0609d4d5666a4dc1a6dc7b21ea808eb615ae5a2c55
font_02_sfnt_off00024722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24722 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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