Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5ef1c66128182d…

MALICIOUS

PDF

107.5 KB Created: 2021-06-27 23:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d06be98bfcd6728e681ad2652660e54f SHA-1: 27175157dbbc4d7f2d4aa908dc9ac67d4815a328 SHA-256: 9e5ef1c66128182d1e55ff797c82ec563a015506f5743cfc4e97c35a43bb046e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised websites, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, providing no direct textual clues, but the heuristic firings strongly indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://toyotalongbien.org/data/dulieu/files/14133909423.pdf In PDF document text
    • http://bygreenpure.com/userfiles/file/benexewapetexidatimaxan.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16074b428ab6da---62910989429.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea8ff9553c---43030559099.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/d3f91864aca5f72a27a5aa31a8cd898b/wotanir.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/xebod.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb2b6d318b---vawebativodiwus.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ded34b3d4c---pelipibupubi.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/f4inimom13r696p2dg00i5tc3k/13550832076.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/wevagejajewazevuseputuj.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072c13e244e8---pifogezijila.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/de0c7c4858bad363cf6cf3fbed661676/75479593676.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/391308db6aa0a8502ed0ab0646ad8fcf/3783692898.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07e8ab250f---95219660422.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/48504868739.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/52418691078.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/sd41hn8grsdk2i6f5jk32o52k0/tofumilosepitodisamo.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/mipina.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/3ca8173fd6a23ffdc8dd4d44970520a3/72594475791.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/tee4ce7a71a6fsu62lrv8tumo8/dugometupireti.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2118232d10---xixox.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/c191002e6d9792d15003555fd22534fc/73046987395.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a3a817b8c---mozowusukemuniwediporota.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/2b7e0e00ccebb42635f54ef3f4dc8926/sisavetap.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/6898426368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=easy+low+calorie+lunch+ideas+for+workPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001422f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A41 17752 bytes
SHA-256: c478acdb133a7c32936457fb4d17dbcc2e84f32de9176bd23c74225186403f0c
font_02_sfnt_off00018767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18767 10848 bytes
SHA-256: 0cb3928addd5d4916e44aed2a736d95f880f062a8a48f6d56762b57df8f664d9

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