Malicious PDF — malware analysis report

Static analysis result for SHA-256 e90aada109b4ed62…

MALICIOUS

PDF

98.8 KB Created: 2021-03-10 17:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: c2080cf368d60bd64504cc929952c6c0 SHA-1: f7c7b74f951a23e87ae574738559e4e3ef3f19ff SHA-256: e90aada109b4ed625fb5a9013c7cf4af41ceb78de97b4aa38e0b75b28c74092f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including those identified as part of a link farm on disposable hosting, suggests a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gimoguvi.ru/wix?keyword=earthwise+trimmer+manual PDF link annotation
    • http://pofaduxiruk.getenjoyment.net/how_to_paint_a_room_with_a_chair_rail.pdfIn PDF document text
    • https://cdn.sqhk.co/xujanezujol/i4o0haK/source_sans_pro_windows.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502336/normal_603a179966d73.pdfIn PDF document text
    • http://supobesopo.mygamesonline.org/onde__feriado_dia_20_de_novembro_em_sp.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomadu/agenicL/girly_wallpapers_for_laptop_hd.pdfIn PDF document text
    • http://kimisorunutom.medianewsonline.com/mepobumojane.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/PjaCghd/sijamaxasavi.pdfIn PDF document text
    • http://wagajikis.iblogger.org/bugoxifeguw.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/fHG9jiF/arena_football_league_2020.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/sein_und_zeit.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabudoxuwa/hbFboig/98341157170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5fe759f70ca7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_600a4c1453ac4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_6046c69123c2e.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/lowrance_hook_3x_dsi_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_6035300c100d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/13996cef-ee40-49c4-ad59-f75504bbe504/31285347989.pdfIn PDF document text
    • http://girupesoja.rf.gd/ieee_format_report.pdfIn PDF document text
    • http://kidereludabiron.epizy.com/zefekufus.pdfIn PDF document text
    • http://dajejumu.rf.gd/17378183981.pdfIn PDF document text
    • http://kubudafexajik.rf.gd/adobe_photoshop_lightroom_classic_classroom_in_a_book_2021_release.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9f00fb-6e71-4618-a913-d9854f0a7899/pidutepedupezimonagega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f32b65e-af23-4ed9-b585-a184c74a5436/mary_poppins_book_series_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e907578-5810-4441-b5da-00aa81b84184/gmat_club_sentence_correction_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63c7b10-a6d2-4fe2-9460-718383506bcd/how_to_take_care_of_patchouli_plant.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_off000137d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D8 4972 bytes
SHA-256: e74891a5402cffd02cb13f4da25a5fb0957a3270d6eb4f93695474a4c0567156
font_01_sfnt_off000148a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148A6 16832 bytes
SHA-256: a3ef399ad88671a59dd6be8f4bc62c7bf961e32f80de7d9a1fc396611a6ae81f