Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bcba470fa72d288…

MALICIOUS

PDF

78.7 KB Created: 2021-03-24 11:29:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 78ac035b31a818fd1757757917257b1b SHA-1: 39b29d1464961336ab27200ad7058c202ed60cc2 SHA-256: 4bcba470fa72d288b595f7f12a1398dbeb173ec54901ad7074553b93c6f087ad
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to phishing sites, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The ClamAV detection further confirms its malicious nature. The document body, though heavily obfuscated, suggests a lure related to a 'certificate of origin fillable pdf', likely intended to trick users into visiting a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://soxebez.ru/award?keyword=certificate+of+origin+fillable+pdf PDF link annotation
    • http://zoo-taxi.site/sheg._stanford._edu_worksheet_answers6ha74.pdfIn PDF document text
    • http://salonly.xyz/panasonic_microwave_oven_nn-sd372s_stainless_steel_countertophcefp.pdfIn PDF document text
    • http://solokekojo.22web.org/the_bunny_game_2010_full_movie.pdfIn PDF document text
    • http://datab.vip/libro_assassins_creed_forsaken_espaol01h18.pdfIn PDF document text
    • http://rogijowop.sportsontheweb.net/autocad_image_not_showing.pdfIn PDF document text
    • http://kawafopi.mygamesonline.org/84824291117.pdfIn PDF document text
    • http://sukutoxuwurif.mywebcommunity.org/anlisis_del_decreto_de_guerra_a_muerte.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/fososi.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/aia_vitality_points.pdfIn PDF document text
    • http://normab-id.com/sonekupafesariferezeds56gz.pdfIn PDF document text
    • http://reduslim-shop.site/bosawojimygdwl.pdfIn PDF document text
    • http://xiruzox.mygamesonline.org/54562084507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_60359d7fa4f43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416151/normal_600286633ae0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_603a892a791f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lagazirixul.rf.gd/55209457531.pdfIn PDF document text
    • http://dolidug.rf.gd/lurigusobubasobozotax.pdfIn PDF document text
    • http://fibejebovef.epizy.com/85540415191.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_592ff4fd133c4caeac12cb65d6a445a2.pdf?index=trueIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_b7b7653678fa4290ae835550cd5287a9.pdf?index=trueIn PDF document text
    • http://pizuzol.onlinewebshop.net/55195486360.pdfIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_f5731919a3a24c3da5ba50e6ade93c89.pdf?index=trueIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_4495ebe6897e48629e9cfc6b452540e4.pdf?index=trueIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_a51fe2d37d424e009f79457740ccba76.pdf?index=trueIn PDF document text
    • http://geforagegi.atwebpages.com/the_golden_goblet_audiobook_chapter_1.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_off0000f427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF427 5192 bytes
SHA-256: afaba11215ef88d011757699624f3b9e562608fd2aa8bf93a41d5570cc95f289
font_01_sfnt_off000105d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D5 11412 bytes
SHA-256: b88ab6d826b62a03ef404904d790d4bdfa566f435f8f42f705dee37571655d4d

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