Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2354f5e864549fb…

MALICIOUS

PDF

88.0 KB Created: 2021-06-28 21:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 456832104581f4fb08caa99a8999ca52 SHA-1: eb99ec3c19533c798be0654654c6f3c4e2fefa2e SHA-256: e2354f5e864549fbc5bcd10fe016ff746216a570232c427e0661949817845469
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for exploiting vulnerabilities or delivering malicious content. The PDF also contains numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://eperon-kochersberg.com/img_db/31069922474.pdf In PDF document text
    • http://mtsskzy.com/userfiles/file/janobalijenigopapo.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/97072644379.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/27179500332a42f663ea7cf1b436eb52/95565330469.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/10559376572.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa4d625d92---nuxagikekaxizevesetejozi.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/vedivewoteke.pdfIn PDF document text
    • https://majubesar.info/contents//files/60430821271.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/12887795301.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/0b43cf970b5a56555099ee23091e23e3/1983143311.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/13o75kl5ffarnfb7ibtstih1mh/8046966971.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a83e2f6d2eb---pezefifovinovirusokara.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/jabapovozijif.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2526e714b8---kedozegexetewilafem.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/gonutobariromiwugokazid.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/6ot76hf0stnen2m33g0mvm0166/53170531276.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/46126429132.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fe031e5ed---rujezagimo.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6a0776fc0---sebuliwategavatat.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/87388372816.pdfIn PDF document text
    • https://davaocarrental.com/images/file/lobugabetadugawisibes.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/52507152350.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/pctus9qbavc8c61s7h5h14mepa/7645516010.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1606d50c330a41---tidasapifomuj.pdfIn PDF document text
    • https://tepihtrava.rs//files/53693789843.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=florida+as+is+residential+contractPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF561 16952 bytes
SHA-256: d45c149e3e29209e3957fd79660302bcc39e64767753440f3496cf2fc872f2d3
font_01_sfnt_off00012177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12177 10340 bytes
SHA-256: b215eaec335aec279c903ebd4aa1dd956e03becc3b1b9aa52250e3fd42f182d6
font_02_sfnt_off000138e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1