Malicious PDF — malware analysis report

Static analysis result for SHA-256 306bbeface9797ef…

MALICIOUS

PDF

77.4 KB Created: 2021-03-25 10:39:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d868319c915b1f9752a58862a075090e SHA-1: 5369fc4804ceb08a3985e1c40c0a0a359cd3929f SHA-256: 306bbeface9797ef648f86b0de6e4aa8fee43343e81214e3cb77e00cbfd5c3c2
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary focus on redirecting users to external sites, such as 'https://gimoguvi.ru/wix?keyword=un+mundo+para+julius+pdf', likely for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a tactic to obscure malicious links within a large number of disposable domains.

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://gimoguvi.ru/wix?keyword=un+mundo+para+julius+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381294/normal_60048a5dcc95f.pdfIn PDF document text
    • http://brumbum3.xyz/fidorubokukikive3jpce.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/YjcfkH3/vegubagamofexorutozugid.pdfIn PDF document text
    • https://cdn.sqhk.co/zivalutapa/dQ7jdge/world_war_2_medal_efficiency_honor_fidelity.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/herXhgj/gafewosedumamor.pdfIn PDF document text
    • http://minoduzu.iblogger.org/20109027498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425910/normal_6049ccc23b91a.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/ynijAib/dank_meme_stickers_whatsapp_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446168/normal_5fe84b1e5672e.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/rBibLi2/nulelewusafopezazujasubas.pdfIn PDF document text
    • http://naturaitalia.space/driving_problems_in_golf_averageyregf.pdfIn PDF document text
    • https://cdn.sqhk.co/betarudigi/NUhahgo/noxexozafuzorivowap.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/agiHyqK/who_is_brain_teaser_and_riddles_level_2.pdfIn PDF document text
    • http://vabuletarikinil.iblogger.org/46877210087.pdfIn PDF document text
    • http://copyrightviolationcenters.com/que_hacer_cuando_te_duele_la_rodilla_por_dentroworiw.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/cIhaxjg/67684538951.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/hbCrIgc/69481201020.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/ge1Uwic/best_movie_creation_software.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/jPRiijb/the_last_survivors_game_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bulifebebavub.epizy.com/18938707334.pdfIn PDF document text
    • http://zipavisaxa.epizy.com/how_to_do_a_curves_workout_at_home.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_off0000eefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFE 5252 bytes
SHA-256: a7b511ef6af7d13984880402c32c1c3cc542914761a6398827d0f6a046d03a92
font_01_sfnt_off000100cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CB 11716 bytes
SHA-256: 45b28080ec60ccab3e5bb64a59c4e940b6160e5408d340259664db4cd881a480

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