Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cc77a276b0cb2c…

MALICIOUS

PDF

68.9 KB Created: 2021-09-28 09:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 29ff37161948525daacdb8386616cb86 SHA-1: 2f6bbe619e8c51b0f15a2e382316a978fd5bf2fb SHA-256: c2cc77a276b0cb2cf6521924afbc45fa3cccdac38c147a2b724c7effac53c922
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded links pointing to compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent. The numerous links suggest an attempt to distribute a payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/ec40d9098e56c98c228cbdb96172587f/28979153817.pdf In PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16132ff89f05ca---9927143111.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/12728087407.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210902212334.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/14532727620.pdfIn PDF document text
    • https://hiroyoung.com/data/files/ladigipomume.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6b3ab7ad7---keguvi.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/ligebeto.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/3021077noep1dd93p0qei02941/22162791061.pdfIn PDF document text
    • http://robedecreateur.com/img/files/90629462797.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/21929411498.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/64229610463.pdfIn PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/70470096070.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/ccf66edb433d67e32cbc85a073a15bb2/19419913238.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/15699763899.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/43287252890.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/zemegedixipokagaraxune.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/36918587063.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/48098799137.pdfIn PDF document text
    • https://vitanov.rs/files/13554201028.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/36921706271.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=mupen64plus+texture+packs+androidPDF 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_off0000ae78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE78 14512 bytes
SHA-256: 4b944c02bf8f246d9af9f59a5772c3c13a4ee3873c043989083a7957a0eba65e
font_01_sfnt_off0000d2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A8 11040 bytes
SHA-256: 7e35c2b8a13574736a64991680c63eee1df835c8d7fb514608f483760eb66f9d
font_02_sfnt_off0000ec93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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