Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12350cd74bcc1a4…

MALICIOUS

PDF

80.2 KB Created: 2021-04-09 06:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cc4e51413b6ef32af866e24681b21e20 SHA-1: 8c4c42be90abacb9128670fd33501f2226b02ab9 SHA-256: d12350cd74bcc1a4d8d1b250f5bfa7bd528e526f50a28dc80425c78f7d0e969b
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9995

Heuristics 4

  • 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://mezovuduw.ru/strik?utm_term=the+monkees+christmas+album+vinyl PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4401976/normal_5fe098da61895.pdfIn PDF document text
    • http://dk-inc.xyz/22612176214vk0at.pdfIn PDF document text
    • https://cdn.sqhk.co/nusideja/iv6TCgc/moffat_tunnel_colorado_weather.pdfIn PDF document text
    • https://cdn.sqhk.co/xabovalizo/nVL85G1/free_music_to_itunes_library.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477409/normal_5fce2bf09aa74.pdfIn PDF document text
    • http://glasshookahcatering.com/doctor_career_paths_ukn25c6.pdfIn PDF document text
    • https://tadeganerusoza.weebly.com/uploads/1/3/1/4/131438541/7987394.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373778/normal_5fdd1e051d06d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5fda6b8b8415a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_603e4f254e946.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404497/normal_60300bbd0c4ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_601223d119752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_60543bed803f1.pdfIn PDF document text
    • http://bigmagazin.xyz/what_is_the_nature_of_history_of_christianityulgev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_603a00a973dd3.pdfIn PDF document text
    • http://usersonlineguardingsettings.site/nepotawodonabaznu62l.pdfIn PDF document text
    • http://fishing-rods2.club/how_to_use_rowenta_pro_iron_steam_stationa7c1q.pdfIn PDF document text
    • https://losujawidejope.weebly.com/uploads/1/3/4/3/134310111/tizatodowegufez.pdfIn PDF document text
    • https://kujuroledok.weebly.com/uploads/1/3/4/0/134040703/83d1405c86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d97d7015-2f39-49a6-b3d7-5793c37b8149/zunujixabonapir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee30c382-75e7-4513-b3d8-eb8cc3f91429/gopomowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3117cc58-11ef-4b0c-a33e-a91c4674792f/99268801359.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80F 5352 bytes
SHA-256: 63417cd41661d782ebe30ec8ff76ad7c5199a11bd51bd35bd4806cf912917ae7
font_01_sfnt_off0000fa23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 10360 bytes
SHA-256: 98db8a614858caea3809d4e17db02d4c7aca23f6f259b612d5be503b0318eb57
font_02_sfnt_off00011de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE5 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

Open this report in the interactive analyzer, or submit your own file for analysis.