Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2b3551779093a4…

MALICIOUS

PDF

86.3 KB Created: 2021-08-11 13:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 425378bf56a23d6c4a1f9594823f766f SHA-1: 5f8fdaf60e1007454b0096b0f7e56a4702f61ff5 SHA-256: 5f2b3551779093a4f4cc9dbc2518cb109deb23ab6afb023e0e3930999272abf8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple domains, including one identified as a compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://garglob.ru/uplcv?utm_term=latest+gidha+boliyan+lyrics+in+punjabi PDF link annotation
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b31b322ed---98213106731.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/35125158706.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/xinitexetosexokuwu.pdfIn PDF document text
    • https://actor-conseil.com/files/file/sutufikewenuwidoxebari.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/raxoxelopofu.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/30a95a339ad4b98ee7e03e69e2a7f4f3/wekuzajefun.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16100a3da96894---fotixumuseweg.pdfIn PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/genitobesatabo.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/401115ebad947aaf51632ddc84077493/nubaruralid.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/7efae16e323336dbb6ed36764cbe2e2a/wevupitamapisizo.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/78kuah9padr7avjo6os3nn2vcb/poxagobugoponiduw.pdfIn PDF document text
    • http://dzbnf.com/upload/file///27296201767.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef752b21dc---jilusepizobewanula.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbffdf3d85---39169684360.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/1620f40a4adae5dfd463a33b30136c2d/vinalopoziketobagaseref.pdfIn PDF document text
    • http://tnetimes.kr/upload/file///57229809424.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/2e6716ce2d3881099c226e28197bd594/webaxezijiwideve.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/nulubugiwikotowu.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/f45bbb89a08444d0c5dfb7f38813c624/75988023356.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d66406820c---duradulubenegum.pdfIn PDF document text
    • http://greaterdeliveranceministries1.com/clients/61527/File/4354641111.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/fuzageviwebubewamubipizo.pdfIn PDF document text
    • http://seja.lv/assets/ckfinder/core/connector/php/uploads/files/lazawesexobumaruv.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_off0000eb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 11232 bytes
SHA-256: cc1e47fd8efe481b4b6013c6763b45cfd2edc67f2e09bd8afddae57e91e9e006
font_01_sfnt_off00010502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10502 18008 bytes
SHA-256: f29729ea28aac565e1b8a2186808d3f670c28832a449e915c1546910ff730e69
font_02_sfnt_off000133a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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