Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14ff58805d6fbca…

MALICIOUS

PDF

100.3 KB Created: 2021-09-07 21:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d4d80263afb030beb365b7bf10d0cb32 SHA-1: 79fc0e5deedc9b05019f84f13c608d74299f514e SHA-256: b14ff58805d6fbcabf1a294683ae400ea97e752ef7149ca59c18cb3cbb39694d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload locations and disposable hosting, suggesting an attempt to redirect users to malicious content. The heuristic 'SE_INVOICE_LURE' indicates the document may be disguised as an invoice or payment request. While no scripts were directly extracted, the presence of numerous external links and the ML classifier's high confidence score strongly suggest malicious intent, likely related to phishing or malware distribution.

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
  • 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.
  • 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://nhorizontours.com/userfiles/files/16992782278.pdf In PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/xijijaronefizawizobafudok.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/fexodojosozuzoju.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/puluxolekubazuxeforir.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/77eb937c453065f845d7bad266403c1f/79229023912.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/29450486673.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f2c18aaae---62993310537.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3ad349c48---ronubolikilap.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/69147369540.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/5g9voqng8074eh3ffjc3vqa6j7/zusepafakakiv.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/ib854q0ra5me9bu1lfo67g0971/toxanafopowifejogujam.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/wozebuvimadurenefovos.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/7429688717.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/90947012402.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c4506e7774b---82810845144.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123743fe58bf---guwawune.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/1a74491d8f75952b8c1e606dc8e7a0a1/sizukawitogijatima.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/rosuvezagel.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa8f946875---bufepuravodojina.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/7111f97526353e376ce526a41b39cb00/miwomesemawekapalif.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/64236299288.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/86975056758.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d07f01b5e9e---lenusilutufozasim.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16086c684bb542---15540640976.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/xokob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=plan+comptable+libanais+pdfPDF 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_off00012445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12445 18180 bytes
SHA-256: 0236493516a78245778f0e8e7a6b67161dd25dabbae0a358ab1b272a7d91c0c6
font_01_sfnt_off00015305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15305 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B1C 10820 bytes
SHA-256: e22fafab2357f5db8295b32276ad70a2d1f169e481dcc5d541bcee182ab45ce0

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