Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf7902924e97275…

MALICIOUS

PDF

77.0 KB Created: 2021-03-20 07:10:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cb147b6deb6c8b0ea9240d4620204123 SHA-1: 059a862f0b72335d5322ddd2e052fad8256fafb6 SHA-256: ebf7902924e9727528cd245973ca63e63da6ef7f96e63ade6ea54586c4159425
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external domains, many of which are hosted on disposable or suspicious platforms. Heuristics indicate this PDF is a link farm designed to redirect users, with ClamAV identifying it as a phishing trojan. The presence of external URIs and the link farm nature strongly suggest a malicious intent to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/123?utm_term=advanced+presentation+skills+pdf PDF link annotation
    • https://robugagemo.weebly.com/uploads/1/3/5/3/135304688/1422042.pdfIn PDF document text
    • https://mologikonazo.weebly.com/uploads/1/3/4/7/134706863/457d17.pdfIn PDF document text
    • http://homeolimp.com/549677136170o4pf.pdfIn PDF document text
    • http://vopagokiniki.mypressonline.com/darosekitejumuki.pdfIn PDF document text
    • http://waralolojogeta.sportsontheweb.net/catering_service_project_report.pdfIn PDF document text
    • http://milesnires.xyz/82178513527yl3yg.pdfIn PDF document text
    • http://zaralutodunuwa.66ghz.com/tifapepimukevezakasis.pdfIn PDF document text
    • https://xovozenoz.weebly.com/uploads/1/3/4/3/134348708/4afbb1.pdfIn PDF document text
    • https://gijowazav.weebly.com/uploads/1/3/4/0/134097260/2925532.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/faliredumexufovazige.pdfIn PDF document text
    • http://carluxepaint.site/pagomucsu0r.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/jalera.pdfIn PDF document text
    • https://jipagulus.weebly.com/uploads/1/3/1/3/131379543/dfd4cf79f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://weponigonimogo.myartsonline.com/86140297916.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/rain_school_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8b1372-2743-4903-9750-4d4b1c8f7448/how_to_add_a_photo_on_top_of_another_photo_in_photoshop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d783f46-130b-4203-b764-cbf83e642e71/evan_moor_homeschool_curriculum.pdfIn PDF document text
    • http://naxeselixifepem.rf.gd/93617636129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0493a516-8211-4481-9ab3-7771bc81c09f/gefolo.pdfIn PDF document text
    • http://zufewutakukaluk.rf.gd/40041994303.pdfIn PDF document text
    • http://vigadibomo.rf.gd/do_you_have_to_take_a_vision_test_to_renew_your_license_in_illinois.pdfIn PDF document text
    • http://vimozav.epizy.com/65120530570.pdfIn PDF document text
    • http://dolinoko.atwebpages.com/burger_king_coupons_august_2020.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_off0000ed68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED68 5264 bytes
SHA-256: 1e583825e49488382e38924f2aaedebc7b31b2a3ee3ad085e45e9312eda22d7f
font_01_sfnt_off0000ff68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF68 11612 bytes
SHA-256: 422722b48b6fc243f5224552adb5b987c515cdff541c58938092b5aa8aff79d6

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