Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33ef1d4a748d531…

MALICIOUS

PDF

83.1 KB Created: 2021-03-26 18:47:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 92f651aaf90f8914c5d63e1ab46aad6c SHA-1: a45df3e96730e8ac9c661d4b24ad2b5fd5fcf9e9 SHA-256: e33ef1d4a748d531ba44a80d0ee25d67d9650a722661a9ce4ee74bf6809a29f6
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to disposable domains and are likely part of a link farm. The document body, though heavily obfuscated, contains text related to 'life coach' and 'free', suggesting a lure. The presence of numerous external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://bologen.ru/strik?utm_term=how+to+become+a+life+coach+for+free PDF link annotation
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/nimek-lepedezex-lazofivamipa-zolinetakupivo.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/WjjTJ5y/kreg_kma2685_circular_saw_guide_review.pdfIn PDF document text
    • https://gumevuwogixuxuj.weebly.com/uploads/1/3/5/3/135317748/9806358.pdfIn PDF document text
    • http://rawokixe.22web.org/hellboy_comic.pdfIn PDF document text
    • http://okclub.org/how_long_does_priority_mail_take_to_ship_to_apo54h0y.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/fhdhihT/23162228361.pdfIn PDF document text
    • http://copyrightmediahelp.com/53819560740vffjc.pdfIn PDF document text
    • https://xafinuwexedigu.weebly.com/uploads/1/3/1/3/131379324/2799948.pdfIn PDF document text
    • https://cdn.sqhk.co/xopigotax/i8Mgsje/dusazolaxerexeluvu.pdfIn PDF document text
    • https://vegebawijinewer.weebly.com/uploads/1/3/2/7/132740558/cca21cee.pdfIn PDF document text
    • http://xozonline.ru/b._ed_books_in_englishqg81u.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/iK887LM/cytus_ii_deemo.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/big_fish_casino_free_chips_and_freebies_digitalmart.onlineoncel.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/jdgchbk/6578000543.pdfIn PDF document text
    • http://fredo.bike/gupasiwu0qyud.pdfIn PDF document text
    • https://vamarimorojikav.weebly.com/uploads/1/3/4/6/134640123/zadawizijufazi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/erik_erikson_biography.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/can_ps3_controllers_be_used_on_ps4.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_3179825ac8f8494e8d5761468819b864.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/how_to_become_a_certified_barista_at_starbucks.pdfIn PDF document text
    • http://tewederukafolez.rf.gd/70049091270.pdfIn PDF document text
    • http://lugaxelike.rf.gd/34789259696.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/table_of_contents_template_design.pdfIn PDF document text
    • https://1794ee33-230d-455b-98b1-84d48067edce.filesusr.com/ugd/551769_45c9396351d946a4add91f20c6def148.pdf?index=trueIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_a6bec41cddfb45f584595d015e524d19.pdf?index=trueIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_d755a59b11864d91bdb10ab0ebd124e6.pdf?index=trueIn PDF document text
    • http://xuxinubobizet.epizy.com/new_android_development_language.pdfIn PDF document text
    • http://tedupogepovajeb.epizy.com/sleeping_beauty_piano_sheet_music.pdfIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_862266d1e223443e8d46eb4b10100940.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF5 4820 bytes
SHA-256: 20d0ed8f2bad43a366a2785fe618f5598fea4044229b8d7ae4c68536fcf1e17b
font_01_sfnt_off00010c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C60 10576 bytes
SHA-256: 2fab92ea2946755dd52b9db2724578d841c5200b5bc10d2037f114f5edf99267
font_02_sfnt_off00012ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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