Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ead5fd5c4479fd6…

MALICIOUS

PDF

75.2 KB Created: 2021-09-01 08:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f34b7433e97b8c4dc4dadcb56306ae8a SHA-1: 796a5b7a98314300c8b79f39502b44cf60bb9342 SHA-256: 2ead5fd5c4479fd69010a73f79733881df3775d28cc5b70f8d90a1e612d5afa9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://bloomx.com/sites/all/sites/bloomx.com/files/xejifarolosobewana.pdf In PDF document text
    • http://sicilyontable.it/userfiles/files/gabadulam.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4be118560---pizomoginelanofufadabe.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/9076539256.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/manenaladixetufizuse.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/92ee2b722e84dbad9af216e2aac8451e/58596351039.pdfIn PDF document text
    • https://funke.be/data/file/xupokis.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/80035296840.pdfIn PDF document text
    • http://gyobel.itpublic/file/11055972430.pdfIn PDF document text
    • http://pk.mo/userfiles/file/12015548471.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/gexidewowijawinitexofup.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/gqco0j3t21fah9jgcbkek6ohc7/lojugunazilu.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffdb8a2358---22203933195.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/b6ef1595bddcd33b7e62ad4d72c93482/loxewigufetug.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/kaxizolufupijunubavu.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/75uj8306t9jrqlsqncsvif56g7/66943336333.pdfIn PDF document text
    • http://uteambio.com/upload/files/46673857098.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/vafesin.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/34761441246.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/wemos.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d31189e41b---zukegase.pdfIn PDF document text
    • http://cartopack.com/Images/file/90433678521.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=pdf+to+text+extractionPDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/47409043310.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_off0000c47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC47A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC91 10360 bytes
SHA-256: 60aa61eaf4f4415c1113708fc0d3a007161cb06b000e7bac077b79b55c298874
font_02_sfnt_off0000f415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 16580 bytes
SHA-256: 9d236890257de8ef534ec5b60b83e2d48c9de0a611576599ba9b1b66ba001437

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