Malicious PDF — malware analysis report

Static analysis result for SHA-256 827d576f41dc29d5…

MALICIOUS

PDF

63.5 KB Created: 2021-02-19 04:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: b447ecb37957f79661a823684357a704 SHA-1: 5b14b0196f4cec26dc049288625724f6254be8a1 SHA-256: 827d576f41dc29d5102de3866f335281219de728b19b89c0ae235d3adc158add
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely involving the execution of JavaScript to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/wix?keyword=foreverliving+products+philippines PDF link annotation
    • http://zeraseb.66ghz.com/51752200900.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/vY1rRia/mosazogijowametunikovama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470228/normal_602d7c8e866b0.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/Ehf9ha5/watch_youtube_videos_offline_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/nugofonavuf/sd9jicO/97211485426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481411/normal_601855ffd0c08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451941/normal_600bcbc9603f5.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/thyroid_gland_physiology_pptvrae6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475727/normal_60198f4486905.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/yhfhaaE/top_war_battle_game_mechanical_gear.pdfIn PDF document text
    • http://nicepics.xyz/tasiteropowekadipodevuriixkyy.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/dz2gcjp/90065943834.pdfIn PDF document text
    • http://fisuruwibowin.66ghz.com/blouse_design_images_2015_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/DDagejj/91199503836.pdfIn PDF document text
    • https://cdn.sqhk.co/xizefonuma/iiggheX/scary_teacher_3d_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/tovizabep/gcaiggh/traffic_empire_tycoon_mod_apk_an1.pdfIn PDF document text
    • https://cdn.sqhk.co/ninujamezol/jgfa8ax/57611503869.pdfIn PDF document text
    • http://electriccannoz.club/sozekawotew0cld.pdfIn PDF document text
    • http://gevixadita.22web.org/12263666182.pdfIn PDF document text
    • http://bandalet.club/acrostic_poem_template_free_printablezckzi.pdfIn PDF document text
    • http://kivanonox.iblogger.org/bangladeshi_baul_gaan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tubupokus.rf.gd/zobavilesim.pdfIn PDF document text
    • http://sikejafomanama.epizy.com/acr_mammography_compression_guidelines.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_off0000bb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB99 5140 bytes
SHA-256: b04dbc81ff92f64644291688aa449f2faf8ff98a09ecc372bf0cb017b412a305
font_01_sfnt_off0000cd20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD20 10440 bytes
SHA-256: 4e22d8ec2dc560568b40d1cce5002addc1d8eaba23bb6ce91ad354900477b14b

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