Malicious PDF — malware analysis report

Static analysis result for SHA-256 d411e1dab58a3183…

MALICIOUS

PDF

67.7 KB Created: 2021-03-20 08:27:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d72394287b70f9501a994caae31c94d0 SHA-1: f869a2dd201169ce907f890d5373e63a5627de19 SHA-256: d411e1dab58a318374f9ee15c082ed0168f701fb37f4cb8226415420b831e0ea
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it acts as a lure to external malicious content, likely a phishing page or a downloader.

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://jumiwimov.ru/wix?keyword=precalculus+with+limits+chapter+1+test+answers PDF link annotation
    • http://you-bestshop.xyz/hp_deskjet_2540_not_printing_colorp75e7.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/viruwofuzufudunifugqdl.pdfIn PDF document text
    • http://swiss-gear-top.xyz/kagewapipogu2frne.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/doena_de_addison.pdfIn PDF document text
    • http://samelike.site/70172624490ntr84.pdfIn PDF document text
    • http://polystate.ru/417486501878f3n5.pdfIn PDF document text
    • http://onlinetyz.xyz/tissot_sea_touch_manual_en_espaol5jn3y.pdfIn PDF document text
    • http://bratskpravojur.ru/82713189163sbyjv.pdfIn PDF document text
    • http://zoosalon.org/10273105026bnaxi.pdfIn PDF document text
    • http://bupetud.xyz/baydardi_ost_audionog0q.pdfIn PDF document text
    • http://dosefokinuvulo.mypressonline.com/81997822302.pdfIn PDF document text
    • http://topmassage.net/dd_nolzurs_marvelous_unpainted_miniatures_young_black_dragonvctyn.pdfIn PDF document text
    • http://fejugutafilevin.scienceontheweb.net/navigators_topical_memory_system.pdfIn PDF document text
    • http://whitetwo.space/5th_grade_math_practicexzluy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_60136d129f0b4c3ebf74620c34d962e7.pdf?index=trueIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_301a243c856a4d80ac9317ecaf8371ed.pdf?index=trueIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_068da994abbf4d519e5b99815e2572af.pdf?index=trueIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_5155559b4f274eb79992b2aa985995fe.pdf?index=trueIn PDF document text
    • https://506dbbd1-d4b3-44b1-a4c9-6b5d0cab6a23.filesusr.com/ugd/c75f60_bb356d8cb04546cd96ae05b37f398e27.pdf?index=trueIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_401369af77ad45b380430310554a10dc.pdf?index=trueIn PDF document text
    • http://gegilifopom.myartsonline.com/nevakipapakopubiraxetora.pdfIn PDF document text
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_fcc17ebf38214027a18b7ce3aa841a34.pdf?index=trueIn PDF document text
    • http://sefokirof.onlinewebshop.net/93424120834.pdfIn PDF document text
    • https://9a86171b-24d8-4f43-8717-687e75280c8f.filesusr.com/ugd/6234e8_76f34979dd3e438ab2f844d1dabf7d1b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD41 5320 bytes
SHA-256: 316ae8a43fa1a7263497b73015bf6569ec4d4b878f70d55b1780dee3f1c7af5a
font_01_sfnt_off0000df3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3E 9932 bytes
SHA-256: 439c866c1b8450eb7cc823d8753faea8ef5e4e5a377c16e58d1bbe419a9dceb0

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