Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaed45795b022b16…

MALICIOUS

PDF

83.6 KB Created: 2021-03-13 18:11:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1ec1a3e8cd61ee7ca01f148f09abd667 SHA-1: cf141a741d94394d7493bc06d9e3c42082af32f3 SHA-256: eaed45795b022b162d3dca269d2bc25f767ae07c1d4cf4b1bb18e77cf367399b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, and contains a significant number of external links, many pointing to disposable hosting. The embedded URLs suggest a link farm designed to redirect users to potentially malicious content, masquerading as a helpful calculator. The presence of external links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=inequality+word+problem+solver+calculator PDF link annotation
    • https://cdn.sqhk.co/zitibidino/i7zgoRy/porupalesejuvovaxo.pdfIn PDF document text
    • http://tadefog.medianewsonline.com/cauda_equina_vs_conus_medullaris.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/gdOihyi/usb_audio_player_pro_apk_5._8._1.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/ckhehdV/tofilobevugugobimede.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/12980466002.pdfIn PDF document text
    • https://cdn.sqhk.co/soxoxefumuv/ighbOhb/slither_io_code_2020_pikachu_skin.pdfIn PDF document text
    • https://wizenifove.weebly.com/uploads/1/3/4/3/134308138/ea5b4.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/jaghXjg/39922246009.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/beruz.pdfIn PDF document text
    • https://cdn.sqhk.co/loxexafetivu/j5thfhf/vuluveronilobexera.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/antiepileptic_drugs_review.pdfIn PDF document text
    • https://kabolonopatine.weebly.com/uploads/1/3/4/2/134265344/sozejonevekut.pdfIn PDF document text
    • http://sogixusi.medianewsonline.com/45666518567.pdfIn PDF document text
    • https://disuterobusubu.weebly.com/uploads/1/3/5/3/135305861/216369.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/W9RlOWq/mystery_trackers_fatal_lesson_download.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/tom_clancy_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/jgfheiH/zekawe.pdfIn PDF document text
    • https://cdn.sqhk.co/tovizabep/eJgcJ97/bmw_red_warning_light_car_on_ramp.pdfIn PDF document text
    • http://punejew.mygamesonline.org/kixijorubulidot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/dasivivido.pdfIn PDF document text
    • http://vebusatoro.atwebpages.com/siwuzududutaxa.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_off0000f8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AD 3708 bytes
SHA-256: 9e39952b8e90d82802f3c7c72e8a567b1bd51c99c161f2fdf4ee67f4a3c076e1
font_01_sfnt_off000105d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D7 5676 bytes
SHA-256: ed83af30b51ac803998aaec95e9be691eb254b559595ecb17d341e11dc401548
font_02_sfnt_off00011923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11923 11524 bytes
SHA-256: 026e6e03647d551586353f64e4617023c0d4deaf620f06a971db4a9e4ac0d41c

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