Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd65ddc6bfd2949a…

MALICIOUS

PDF

91.3 KB Created: 2021-09-16 21:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 63f142f3e52752eb04ce13638947c1b5 SHA-1: 6a2baf9d64ba9a9a63738bd15862780774dc212a SHA-256: dd65ddc6bfd2949a42e15a7744dee8c438338865b61bace76e17d4dd5b70418d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification confirm its malicious nature, likely as a phishing or trojan delivery mechanism. No scripts were extracted, but the extensive URL usage suggests the primary attack vector is directing users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://smidgel.ru/uplcv?utm_term=convert+video+to+music+online PDF link annotation
    • http://ferrogep99.hu/static/media/file/59836007779.pdfIn PDF document text
    • http://bxbrdh.marketsearching.com/upload/files/rupimo.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/abf5dff57225ed137c88b81c06a19335/61433756771.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/fikekolosulepol.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f2ca759065df43595c138446025232b1/lapapapikumojovul.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/levowoxeduregebi.pdfIn PDF document text
    • https://ckmandarin.com/uploads/rimujemegaxavirawi.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/69731104353.pdfIn PDF document text
    • https://xn--90ah6akb9e.xn--p1ai/f/file/19984138644.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/tosanosekebevibabozel.pdfIn PDF document text
    • https://orcasproje.com/userfiles/file/2904790183.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/molijotibagavulidugelovir.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/mimikokalesevukelazugoni.pdfIn PDF document text
    • http://kelkenaghshband.com/app/webroot/img/files/nivutigawi.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/45951980487.pdfIn PDF document text
    • http://huefpdf.org/upload/file/27196149751.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/sazasanolaxa.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/f39f40839245e31558555f47a0cadfe4/nuvaziditologapigasevaga.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/qgoj51uglv9jl7fo1i0d3uhcq1/nokasamikuzivoze.pdfIn PDF document text
    • http://albertf.madteam.net/ckfinder/userfiles/files/2491640329.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/41935604955.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/47516342046.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/janezivinowutuworetos.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1612f25eb60ab3---96718320548.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/030144162639.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/52b03b021713935b32ed49f66d7999f3/82468938347.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_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11724 18688 bytes
SHA-256: 2317ecf5a3142235c1d5dec9baa6f964d95fe4698eee999079908a7f9a275687
font_02_sfnt_off00014789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14789 10568 bytes
SHA-256: 8d8bffcd78c02292f25507115e3ce6461ac08a1f7a85004dc4d0e1d7693f19c8

Open this report in the interactive analyzer, or submit your own file for analysis.