Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece6de6abc1e0dd8…

MALICIOUS

PDF

74.3 KB Created: 2021-02-28 07:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: aeb4acc8aa8a537baca739d90c3264df SHA-1: c2f4e86378952c8003f49f35fb5c5d35396d0167 SHA-256: ece6de6abc1e0dd83e851f66f01aa89f4aeaca5540c47f4c3adca43de79d07c2
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, many of which point to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

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://zajinet.ru/wix?keyword=area+of+a+circle+word+problems+examples PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368224/normal_5ff261c77f0d5.pdfIn PDF document text
    • http://paypallsecurity.com/guided_busway_timetable_sunday0p6kq.pdfIn PDF document text
    • http://ogranicbio.space/probability_practice_problems_and_solutionsuf1gk.pdfIn PDF document text
    • http://telemprom.xyz/karumigepe5bgpi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_600a1e2b695d2.pdfIn PDF document text
    • https://debarinibew.weebly.com/uploads/1/3/0/7/130775297/misowe.pdfIn PDF document text
    • http://miwodenexiz.iblogger.org/the_woman_in_the_window_release_date_usa.pdfIn PDF document text
    • https://tedotedonux.weebly.com/uploads/1/3/0/7/130775879/raxebu_rapavotoni_zometerewuril.pdfIn PDF document text
    • https://sarogixi.weebly.com/uploads/1/3/0/8/130813770/lopino-vanikoniwe-dopodazeweb-sivuzokepozoniw.pdfIn PDF document text
    • http://webdefilmizle.com/rilakikerisezedepovoka074ex.pdfIn PDF document text
    • http://lnstagramverifycentre.com/stihl_ts420_for_sale3ijg2.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/hahhWja/last_hope_zombie_sniper_3d_hack_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366055/normal_5fc82a4416e63.pdfIn PDF document text
    • http://usmileofficial.site/don_moen_worship_songs_free_mp3_downloaddua35.pdfIn PDF document text
    • https://favadela.weebly.com/uploads/1/3/1/0/131070298/xobovuruxogik-mojogasikujafas.pdfIn PDF document text
    • http://wide-mean.top/how_to_replace_the_handle_on_my_ge_microwave1f6gw.pdfIn PDF document text
    • http://organize.shop/what_is_the_purpose_of_meditation_in_buddhismfm12a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ninalosuza.rf.gd/how_to_set_float_switch.pdfIn PDF document text
    • http://bejopirobi.epizy.com/distributed_systems_architecture_a_middleware_approach.pdfIn PDF document text
    • http://robogotut.epizy.com/daydream_believer_sheet_music.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_off0000e5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EA 5592 bytes
SHA-256: cdef247d4b54c86afb0bdf62ca9e043e8c58a9c5b415fcb2aa45aeea528e6c24
font_01_sfnt_off0000f8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E5 10252 bytes
SHA-256: 1a6584440232f8d465c19b6f633a5ffca9a5a20f0ff2cb4069660f0b8b0b7269

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