Malicious PDF — malware analysis report

Static analysis result for SHA-256 456ed3bad8f58c3c…

MALICIOUS

PDF

80.9 KB Created: 2021-09-05 20:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 90ad267bcc37e90ea7ff4f27603621fa SHA-1: 5b105c3d19a954110f5df82227ee76b4cfae80d4 SHA-256: 456ed3bad8f58c3cb5647bbd9860c6233ad0cacf6c7d746d202c361673031391
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to deliver phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • 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://bacsiha.com/public/ckfinder/userfiles/files/faramuzovelojopisen.pdf In PDF document text
    • https://vicareyou.com/userfiles/file/sogip.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/kosekakiforomiva.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/8c3c5fe7a794ff56240b7d9a1561808a/vekaguroratituwafevi.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/21715750217.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d4cb21eb3cf---78327285827.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/nl776rmnrraebdhss0mvhsiris/5505601138.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/24850140041.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/fajupesepejotorevov.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/fejanepogifometusev.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/8a47b3f57055de72aac4f3a84a50a21a/mudibunozupen.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/80194043015.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/bf5828253ed6fe3217aa4f05790051da/57648508472.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/958acad3c8635598b028b21b2608ef31/96669001625.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/7332902493.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/0354e7c47ef799ba837cd1557a3f631e/42592394807.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848abe64c83---70196695554.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821f6753d83---daxawulomipigipusuza.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c5428494d---kupobak.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/bowobegirivigun.pdfIn PDF document text
    • http://ofipapel.org//ckfinder/userfiles/files/dipiwusajawofu.pdfIn PDF document text
    • https://classicandcamper.co.uk/wp-content/plugins/super-forms/uploads/php/files/sp5jv1e6d3esq1pgnen2oh2vfd/kezepabetusi.pdfIn PDF document text
    • http://brownewingfamily.com/clients/a/a4/a4d7a48ed280e719b438ae57db99af5e/File/66783149012.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/4fce0d87fdca2d6de213f88e3f6db327/bulajadaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=club+car+precedent+parts+manual+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_off0000d8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A1 17352 bytes
SHA-256: 782eeb1ae604ac24fa73c9c4ca186a0319321f27ba2e2e145412fb8dae9de08b
font_01_sfnt_off00010558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10558 10840 bytes
SHA-256: 6ce5effe8e747a47bc2fccb9e6e35f9cf7a7bd4603d45b6b5147dc6002c4dd4e
font_02_sfnt_off00011e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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