Malicious PDF — malware analysis report

Static analysis result for SHA-256 14400c29820a205f…

MALICIOUS

PDF

83.0 KB Created: 2021-03-28 16:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3a0cfa0b9bcacd20b3e6da2c998bbbe8 SHA-1: e35a2e2ec207309b90c307b1c3fd514b9d43ee43 SHA-256: 14400c29820a205f4205f89eba506d4558444adbc775b48d3bbef95b2e807992
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. The document contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure strongly suggest an attempt to exploit user trust by mimicking search results or informational content to drive traffic to attacker-controlled domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=candidiasis+oral+infantil+pdf PDF link annotation
    • http://libralab.digital/google_maps_has_my_home_address_wrongbiluq.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/how_to_repair_bose_wave_music_system.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/1sic7w7/download_game_hang_line_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408601/normal_5fe58da4457c0.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/fU4tlAJ/17441801060.pdfIn PDF document text
    • http://svoytrylend.xyz/calligraphy_fonts_for_mac_freesythg.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/HDjdaMv/27699719825.pdfIn PDF document text
    • http://my-favshope.online/sogisutukonalutmxfk.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://bimadepunepi.mypressonline.com/ssc_2020_time_table_maharashtra.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/addicted_novel_by_zane.pdfIn PDF document text
    • http://kagaromorin.medianewsonline.com/different_laboratory_apparatus_and_their_uses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413454/normal_602097dd188ef.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/lasko_high_velocity_blower_fan_cleaning.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/ejercicios_de_lectura_y_comprension_para_tercer_grado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://836291d8-7b77-40db-be8c-3105928c7ef3.filesusr.com/ugd/aae074_e24156f8621c4ab69c8d890a803c125a.pdf?index=trueIn PDF document text
    • http://fojakosi.atwebpages.com/65175175644.pdfIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_b15de39c6bdd479a8e976fd9c58cac0d.pdf?index=trueIn 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_off000102b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B9 4940 bytes
SHA-256: 0489772c259c7fce94072745a0da7e37214ab36d65370647663b9e68b19ed32a
font_01_sfnt_off00011390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11390 12984 bytes
SHA-256: ceb63a410b7a11de65686f99a9c3d538d61e918d6a8b0d59efb0a5cb66e765ad

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