Malicious PDF — malware analysis report

Static analysis result for SHA-256 53036513f07a3d82…

MALICIOUS

PDF

86.0 KB Created: 2021-07-24 02:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d9e473fc1bfda213c4ae2d6a2e992dc0 SHA-1: 2fe7ca94525fa32923eb580d21f1e3a9616a11a2 SHA-256: 53036513f07a3d820f13d58a03740d895b26eba405a01c187925991f2f5d3046
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress uploads and other domains, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

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://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/lmp1cf5r7u79c4hnfh28ec8as2/buvaserupeguvapitolagu.pdf In PDF document text
    • https://xlspandoek.nl/userfiles/file/rutofusajemigeralevuze.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/zulezitafoneborudixused.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/samatijoxedop.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/badijizofonevol.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/9a1ea91d77bf89fbad818ca617e92be1/finikotobujot.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/41163134053.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/74981555067.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/17740863295.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/7310513dc28c17d391b3e2d6047451a1/41434566602.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/efe8445f74f97003f2d74ca2b680fd04/pefatapidupisezikuvajabuw.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/vebekaxefatoto.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/c47e2bbbd3unlrgftpjm76jic3/53310261676.pdfIn PDF document text
    • http://polloricowings.com/uploads/files/10622344920.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16075cfc7bb0fc---faxiwoninogodinovomunima.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/7671cb872b3ae2abf2038285307e9e65/nekinavetixogubi.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/dipuvotapupinutukoxone.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/91733249916.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/vgmga8ldsseb5flp9hcgpcdfhd/12224570023.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/bekuporobixun.pdfIn PDF document text
    • http://microlana.com/ckfinder/userfiles/files/vigigilol.pdfIn PDF document text
    • http://rayanchem.com/d/files/vobonepat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+ultrasonic+cavitation+worksPDF 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_off0000ed01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED01 17360 bytes
SHA-256: ff451ac803a1776850ba4f06f01dd986afc20895813ca0a244733c4d22e7b6ca
font_01_sfnt_off00011a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001326e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326E 10428 bytes
SHA-256: 350697d236d1b3a0307d62efa9bdd589fd2ac0864a95315db2acf9196341b84c

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