Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4dd71b423a86a9…

MALICIOUS

PDF

79.0 KB Created: 2021-03-05 12:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 440a626a9a16228e99725baf4f6c0422 SHA-1: 6fdfdb941aabc9ec366cffe91666eb881e65ab3e SHA-256: bd4dd71b423a86a983954cef86989627dbe4e9392d008cd3bc1e0f4eb0fb3e60
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a notable heuristic identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely lead to further stages of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/aws?utm_term=starcraft+camper+manufacturer PDF link annotation
    • http://help-business-media.com/88331932289n1w8b.pdfIn PDF document text
    • http://shtampshop.ru/who_is_meursault_in_the_strangervxoyj.pdfIn PDF document text
    • http://pavogireb.22web.org/ocarina_of_time_3ds_heart_pieces_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/yghghhg/xebumowunaxegugaxu.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/81724109788.pdfIn PDF document text
    • http://wirelosine.22web.org/aarakshan_movie_mp4.pdfIn PDF document text
    • http://pujipaxubeko.22web.org/16184589218.pdfIn PDF document text
    • http://nat-yoga.space/658248091730cfne.pdfIn PDF document text
    • http://soldatskaya6.ru/classroom_screen_exampleskirw0.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/icVgbRH/just_kill_me_3_mod_apk_latest_version.pdfIn PDF document text
    • http://tozokexijuxizis.iblogger.org/80588153562.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/kujiramepufubunagit.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/gusanuvovitolexoturuxapod.pdfIn PDF document text
    • https://cdn.sqhk.co/gagupibi/uqijGhg/gagogopaxonedisetogabu.pdfIn PDF document text
    • http://moymagazin.xyz/dabanebevigivomorite1xm1t.pdfIn PDF document text
    • http://ctyr.ru/224753320055w2tg.pdfIn PDF document text
    • http://idealica-italiaofficial.site/pujibibaxoretozama18kmn.pdfIn PDF document text
    • http://fosavaxenu.mypressonline.com/homemade_poultice_to_draw_out_infection.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://karifopiti.epizy.com/lofute.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/71743109371.pdfIn PDF document text
    • http://lugirike.epizy.com/uric_acid_diet_chart_in_bengali.pdfIn PDF document text
    • http://xaterukojokose.rf.gd/implementing_iso_9000_quality_management_system.pdfIn PDF document text
    • http://zolorame.rf.gd/descriptive_language_that_appeals_to_the_sense_of_taste.pdfIn PDF document text
    • http://feramivo.rf.gd/linux_commands_beginners_tutorial.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB90 4776 bytes
SHA-256: 2203e25bac0127fff6e19acf2b80f18c1178618c1285cfefa79e652bbbe7a2ca
font_01_sfnt_off0000fba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA2 10788 bytes
SHA-256: 2b73e3c3dbf4d1eb37c8412b01bdb7382eb71938fa83b35fe7dd503d337f2bd1
font_02_sfnt_off0001208a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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