Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d858afd40ff53e3…

MALICIOUS

PDF

86.8 KB Created: 2021-07-25 16:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 06a0170263e4d83c4fa929634c15c1fd SHA-1: b68decbfa946f08023c5725b45c9ed1d0dcc0339 SHA-256: 2d858afd40ff53e37e6ab4cdf4c0d7a5567dd694489f5df3730efa39569b3438
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://endemic-capital.com/uploads/files/fuzenevavutuvujopovisepo.pdf In PDF document text
    • http://jyotiacademicpress.org/uploads/file/62943935478.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077c9491e4ee---dunajuvulojuxuxej.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d900702fa---bozosunupodadowa.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/595433449.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/52752660046.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a31c73ad88---75694849485.pdfIn PDF document text
    • http://izdepskifamily.com/clients/1/1a/1adacdf247316bc4617b3617d965acc7/File/72400890073.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b26779333---depulenokukotuma.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081d87b373e5---xivonufejavebawotakusi.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/92403016629.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/67426952919.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/loia9vvkroiutdh5nnavfba9hn/xuresasafojapadefebidid.pdfIn PDF document text
    • http://feg.vn/uploads/files/25182916366.pdfIn PDF document text
    • http://velisend.ru/photos/file/zefoj.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160788bbe86f5a---giwowanodudasoba.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///womasirobapizokujofom.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/mt0v1174pn6qosuork4m7858t1/79948681049.pdfIn PDF document text
    • http://caigeshi.com/uploadfile/file/2021061023194073499.pdfIn PDF document text
    • https://tangente-mag.com/img/file/bovelomegujewufafivak.pdfIn PDF document text
    • http://djapm.com/userfiles/file/40550464857.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/sotitenimebuvov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=nelson+math+textbook+grade+8+pdfPDF 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_off0000eec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC5 16464 bytes
SHA-256: f05bb3bce17260089535e734d232153eb1a43708332fa08517122a593fd14e66
font_01_sfnt_off00011969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11969 11372 bytes
SHA-256: c629502abf36f5cca7b7f5ace93d4cf363f09ba9dbc1cdc66051d60651ea8032
font_02_sfnt_off000133a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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