Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d7d6572b518eb5…

MALICIOUS

PDF

78.2 KB Created: 2021-09-03 06:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5f645015079ee68853b7ac1d194a3235 SHA-1: 3a9ff47cac326e0fb516686f0c323d2e3ce85e28 SHA-256: 08d7d6572b518eb580a2c7d0d4fff6d41f83eda3af222661272c9365c941240b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to a phishing or trojan delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://philabc.ru/uplcv?utm_term=hamilton+beach+toaster+oven+manual+31104 PDF link annotation
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/makaboxakal.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3296eaff7c---tixixixefa.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9b65e632c---towezokenepotilo.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/nigaxejixubava.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/ua9v98ed23d2t13b79i8c0u29e/3151306482.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/9ed06c4888c03614a2f05441582d9789/47069103916.pdfIn PDF document text
    • http://simonide.org/userfiles/file/riwizerub.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/vosekisubogun.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/jejosozodibopujoji.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb418dbd84c---xefokuvorojujeni.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086540eb6152---6498492939.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/lasalibexuj.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/rhhv4ku7r0gaanif1elict1iee/82757629604.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/cb5289092e97daa9f1f585d32e367341/51843979826.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/77997147831.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e67a3ab3a97---59589433070.pdfIn PDF document text
    • http://chhsclassof70.com/clients/1/1f/1f6d1b94cf555b90b9f410dfa82aea5f/File/robirenenujagof.pdfIn PDF document text
    • http://boxethai38.com/upload/file/79572138270.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/75887629186.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/7073782839.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/66607693580.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ba99cae5a---32677571050.pdfIn 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://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_off0000cd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9F 17152 bytes
SHA-256: 43f4955753a24c3ec1b499754f3df1b16596ab74e4ca51ce1e531b17741556e4
font_01_sfnt_off0000f8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001110b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110B 11216 bytes
SHA-256: 4871a6cf41bd8df3067242ec3244187476066c128f8964e2b417bd4f42964b0a

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