Malicious PDF — malware analysis report

Static analysis result for SHA-256 666d97ebccaa1f52…

MALICIOUS

PDF

87.6 KB Created: 2021-03-15 22:59:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 406543092fef0453b011e6ef21dd6928 SHA-1: d51413f3a9d82be7ae3fdc7547faa44ee88dea16 SHA-256: 666d97ebccaa1f528fe7a9555788a5fd38a7dd754240e35ff5aab4e6e8aab4c3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, suggesting the document's primary purpose is to redirect users to potentially malicious content. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

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://xajibur.ru/123?utm_term=bootstrap+login+and+registration+form+template+free PDF link annotation
    • http://nemagufi.mywebcommunity.org/nuxitoxi.pdfIn PDF document text
    • http://lezobul.medianewsonline.com/whirlpool_quiet_partner_i_stops_mid_cycle.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/kobabako.pdfIn PDF document text
    • http://purpless.vip/amplificador_crown_xti_2000_especificacionesjbfqz.pdfIn PDF document text
    • http://khareedforosh.com/android_programming_the_big_nerd_ranch_guide_3rd_edition_epubdcs7w.pdfIn PDF document text
    • https://vukedezesul.weebly.com/uploads/1/3/0/7/130776134/6004365.pdfIn PDF document text
    • http://bigpleasure.ru/gazoj4uw6i.pdfIn PDF document text
    • http://zebiripu.mygamesonline.org/how_to_cite_a_document_in_chicago_style.pdfIn PDF document text
    • https://dixuxizexejo.weebly.com/uploads/1/3/0/7/130740209/e4c918969ed405.pdfIn PDF document text
    • http://uaregroup.com/how_to_use_a_blanket_as_a_seat_covernmxjd.pdfIn PDF document text
    • http://myfoxing.online/eurofins_aptitude_questionskqft5.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/ralemewinip.pdfIn PDF document text
    • http://legegapepapo.medianewsonline.com/58981526147.pdfIn PDF document text
    • http://easybranding.org/sentry_safe_x125_owners_manualedj9r.pdfIn PDF document text
    • https://gasatuba.weebly.com/uploads/1/3/4/5/134596028/c0ac7ab3478c2b.pdfIn PDF document text
    • http://atlas-copco.su/rutopizimaxowonukudw50w9.pdfIn PDF document text
    • http://pixell.store/onn_dvd_player_error_disc4391k.pdfIn PDF document text
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/3bb5158.pdfIn PDF document text
    • http://amsidisi.xyz/how_much_propane_does_a_buddy_heater_usesguyz.pdfIn PDF document text
    • http://wssummer.space/how_to_reset_pioneer_car_stereo_bluetoothih65v.pdfIn PDF document text
    • https://zowotojezef.weebly.com/uploads/1/3/4/3/134330732/lujakewa.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/advanced_academic_vocabulary_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bepolujogox.atwebpages.com/merovevipolaro.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/how_to_structure_a_tv_pitch.pdfIn PDF document text
    • http://pozijawikubinun.myartsonline.com/adding_subtracting_integers_word_problems.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_off00011914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11914 5408 bytes
SHA-256: bdf81d6f4d216c5e0a3ede67e5d1ca0565ed1f6d0a5810428451de9b84830436
font_01_sfnt_off00012b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B69 10852 bytes
SHA-256: 799c07f370b9217c9d56029b57595335bd2b6faa2ef85feaccb509dc342944a9

Open this report in the interactive analyzer, or submit your own file for analysis.