Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c3f0b821af5c90…

MALICIOUS

PDF

90.8 KB Created: 2021-03-15 21:30:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7e83067bf4fb319977639dd69f405547 SHA-1: da6e32ecedfd62dbee8e4cb445a5bc94c8ec37db SHA-256: b2c3f0b821af5c90395411e9e9e98b32a2fc9d4df1b70fd9c9e9e2ef7b2a6da8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The presence of embedded URLs suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/aws?utm_term=waterpik+water+flosser+cordless+plus+vs+ultra PDF link annotation
    • https://rakumimow.weebly.com/uploads/1/3/5/9/135957304/2625808.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/super_mario_bros_2_lost_levels_game_genie_codes.pdfIn PDF document text
    • http://shishkin-seed.xyz/best_keyboard_case_for_amazon_fire_10cjfy4.pdfIn PDF document text
    • http://verenica.net/20335337763kd43e.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/hj0Wcif/gatepanek.pdfIn PDF document text
    • https://cdn.sqhk.co/jetekujob/haa2gi0/46631539173.pdfIn PDF document text
    • http://avto-document.site/age_of_empires_3_product_key_generatorxpgaa.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/biturivekegexo-ruzaw-kafoperupa-nuxawilutubip.pdfIn PDF document text
    • https://cdn.sqhk.co/ganinidunop/sgPgiii/board_games_literature.pdfIn PDF document text
    • http://keepqifi.space/can_you_upload_videos_to_wixkp3s3.pdfIn PDF document text
    • http://pobadabodoz.scienceontheweb.net/sat_math_level_2_score_distribution.pdfIn PDF document text
    • http://xsale.trade/88766950267or6h1.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/57762596550gnpi9.pdfIn PDF document text
    • https://rukururage.weebly.com/uploads/1/3/0/9/130968917/jisesazere.pdfIn PDF document text
    • http://kfnwejfnkwheklf.space/95566519263kxcuj.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/jhjOwjj/harvard_business_manager_digital_marketing_course.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fitadag.epizy.com/80764920343.pdfIn PDF document text
    • http://zisubaripuxiba.epizy.com/difevitepubetubadevu.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D8 6812 bytes
SHA-256: 31d4dd97cf5147e6b059c24d0fa5ef82248f625d272ff84a9e6c0d2f8a785f9a
font_01_sfnt_off0001230d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230D 5376 bytes
SHA-256: 60588f8b601b24ffb848f151394aa20446bb1f529e0c09dd43783ef9b02f218f
font_02_sfnt_off0001358c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358C 11264 bytes
SHA-256: 2c35c5dfbe2e4a885e05ef128ada4013c06f74dcce754f631a7588dac93a372a

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