Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3953c4e460793ad…

MALICIOUS

PDF

74.8 KB Created: 2021-03-19 06:53:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48a578a8064a0ac86f5b9376b0677c51 SHA-1: b3de330d105681065bdd024ed14db6a5d888f27b SHA-256: e3953c4e460793ad9f74bfdb2c75222d6b15b88e3d1c79ae6dc9509a883fb7e9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the primary heuristic identifying it as a link farm designed for SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=romeo+and+juliet+timeline+activity
    • http://vadinesejel.22web.org/microsoft_project_standard_2016_free_trial_download.pdf
    • http://drnextact.xyz/didexodofxke4x.pdf
    • http://wazasutosas.iblogger.org/core_maths_questions_and_answers.pdf
    • http://saxoxiwu.iblogger.org/58019652478.pdf
    • http://insuranceautousa.com/sadness_and_sorrow_piano_midic5mj2.pdf
    • http://tixshopclub.fun/types_of_organisms_found_in_an_ecosystempaa59.pdf
    • http://agent-spv.space/flowers_in_the_attic_book_review_common_sense_mediamxadi.pdf
    • http://siankaanmexico.com/rogers_cup_draw_sheetu6141.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ee0a788d-b186-4123-8535-c4aa0df5e7ca/6219208085.pdf
    • http://bagabosafeko.epizy.com/contemporary_issues_in_financial_reporting.pdf
    • https://uploads.strikinglycdn.com/files/81ecd2f0-53d9-4ecd-86eb-f448272a4213/34783010058.pdf
    • https://s3.amazonaws.com/sirilagewuga/79253201594.pdf
    • https://s3.amazonaws.com/tuzakifezara/nexa_extra_bold_italic_font_free.pdf
    • https://s3.amazonaws.com/datarofapakil/tizaponaxuwerevovovik.pdf
    • https://uploads.strikinglycdn.com/files/f113a555-c917-40e4-9fcc-31f3e11877d9/kiwid.pdf
    • https://uploads.strikinglycdn.com/files/095ad87e-88bd-487b-9ff6-00148f271dbb/how_to_vent_a_portable_air_conditioner_with_crank_out_windows.pdf
    • http://luvugotanufulav.epizy.com/64193402552.pdf
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_95d662197fa24384b00084bf316e70d8.pdf?index=true
    • https://s3.amazonaws.com/zolerazowubow/car_sticker_design_software_free.pdf
    • https://f8b57e9d-e272-4783-b6f5-6420e6b93425.filesusr.com/ugd/886b73_46d9925eff1643d18808781ca36a327b.pdf?index=true
    • https://s3.amazonaws.com/vikukinumet/62323379922.pdf
    • https://uploads.strikinglycdn.com/files/dd708209-e2eb-4162-9c0e-18d21eca34a2/meguxoxa.pdf
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_35cd5cce9c9f49d188b6046263dbec72.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a640ecf7-3496-4e5f-a010-2822ff03080d/walmart_hours_of_operation_christmas_eve_2020.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e753.bin
5d96db72ae62bc5dbf63e045784c362811396f2ad0b0b2aeb7ffcfb36060005f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 5056 bytes
font_01_sfnt_off0000f88b.bin
f1e558d771fe093d3e4a3ce3f981d8e6bae037ee86b33937112e9048e59c43b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF88B 11072 bytes

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