Malicious PDF — malware analysis report

Static analysis result for SHA-256 9daf525d22505b74…

MALICIOUS

PDF

91.3 KB Created: 2021-07-16 10:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: da5b7bad33770be636f6dc2ac5563fc8 SHA-1: f4d8b6f5c06d2df8344e72030130c6df439b8a64 SHA-256: 9daf525d22505b74662e6d25a0191150504318afdeb63747e25a3a011c287169
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The presence of external URIs and the overall structure point towards a phishing or malicious redirection attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://hostmegasoft.com/calisma2/files/uploads/41732598525.pdf In PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/temodavazatuw.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/6963343193.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca49dbbb73---xaxixofafawevenex.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/28610744924.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/5645358214.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608adeea7517b---46909250661.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3704ba0940---fonapajinani.pdfIn PDF document text
    • https://familienarbeit3plus.ch/userfiles/files/lugurujojivokab.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/84398766063.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/037598e51a37e9d72ef3728a5fd74ca5/ranomesamugevabix.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/vixugalepelo.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/79159508459.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc55b75694---kejamakogitememuludekezu.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/morojup.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c03a9e5a89---sevejedukuzijivojuliwitob.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6b0feb42d---34011277480.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aea00235d72---gubozozosedemitum.pdfIn PDF document text
    • http://thienanglass.vn/upload/files/75633151510.pdfIn PDF document text
    • http://vasamo.org/pds/userfiles/files/39322980047.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e247d3b9ae.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/10334657001.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=theme+of+the+handsomest+drowned+man+in+the+worldPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001024d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A64 10668 bytes
SHA-256: 417a75ddcc6ebc1e090e0cc4b179b60641565afe9e24e8d28e77359ada76fbdd
font_02_sfnt_off000132b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B7 17448 bytes
SHA-256: e22aa8c7cb89437b1e4dc6f2ddeaab52ac5c9b2cf6a13519668e2e790454ad5c

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