Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e304d36cf1201c5…

MALICIOUS

PDF

76.6 KB Created: 2021-03-23 01:04:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3d5863a3e0bed8294fc1222d04cd12a1 SHA-1: 55d8ac55da5e1996a1becb0c2efe750fe2d02e1f SHA-256: 7e304d36cf1201c5af5c28c2687f17c4dc281f72e39502df91d75526b8af84c9
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 0.9993

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://maypoin.ru/wix?keyword=adobe+photoshop+cc+mac+crack+tutorial PDF link annotation
    • https://kadonomu.weebly.com/uploads/1/3/1/4/131454950/vimanuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/dukizukijire/hggdagh/supazujeti.pdfIn PDF document text
    • https://binikefesomeb.weebly.com/uploads/1/3/5/3/135386190/2491590.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/1wbO0ii/zijawuxiba.pdfIn PDF document text
    • https://fikuzafunowu.weebly.com/uploads/1/3/1/8/131857523/0247416.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/40220391924.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/74026550384.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/icicYDa/hyperion_launcher_pro_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/hizhche/62782514463.pdfIn PDF document text
    • http://didavixakodix.22web.org/what_is_n_type_semiconductor_with_example.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/nbgeXge/pilot_logbook_excel_download.pdfIn PDF document text
    • https://turugoduzo.weebly.com/uploads/1/3/0/7/130739986/rojitumoxagedejati.pdfIn PDF document text
    • http://giwudogor.scienceontheweb.net/75470500777.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/203a2c7b-a342-494d-be2a-88bb7a74397f/gadaxoruxobipukag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fc6dc2-5914-4988-ad59-a5a57d2b6ba9/33748312617.pdfIn PDF document text
    • http://muwiliwus.epizy.com/87742459714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce0df87-de53-40cc-b535-cd80c10942c4/35850683656.pdfIn PDF document text
    • http://kuwubuvorij.rf.gd/environmental_impact_assessment.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/kofirerimuxevitekexigapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75800c34-034e-4637-b1ce-19cde581322b/wugogunizaludojil.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/best_books_for_gmat_math_preparation.pdfIn PDF document text
    • http://riporem.epizy.com/the_american_chestnut_readworks_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f5884f5-bb45-47ef-8e26-028c2c6ace06/18961953168.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_off0000ed6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6C 5504 bytes
SHA-256: afe1ea1a71ba4797ac2771cd20238e37c5a8244b3c3c5b26c57475f4e3741bfd
font_01_sfnt_off0000ffef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEF 10788 bytes
SHA-256: b483b7439bf107938650e40859ff488de8b598fa92fb0f868090c5f44b894325

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