Malicious PDF — malware analysis report

Static analysis result for SHA-256 06677dc871032352…

MALICIOUS

PDF

76.2 KB Created: 2021-09-09 20:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: c25adbd0f4f63d8987e9702d9ee85a8e SHA-1: 5128fe98e14ca277388d414d468301aa3ef77a64 SHA-256: 06677dc871032352d73cb157b5eff9bef4d66627a1ed87a4916aa01c9697d9c8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to further malicious content or phishing sites. The presence of a 'download button' heuristic suggests a lure to trick users into downloading something. While no scripts were explicitly extracted, the nature of link farms in PDFs often involves JavaScript to facilitate redirects or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://byocamacho.com/ckfinder/userfiles/files/72650400269.pdf In PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613405c18f5e3---lodixikafotoxoxajupirur.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/genabet.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/rawepagupage.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/1427296674.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/8424943251.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/rijewuvizizusi.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/xoginewalex.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130682371822---90815879619.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/7e960f9d34812522accfd7ec627768ca/giruwipozoxunidaj.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/1730827214.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/29377359757.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/patirirarotibe.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/96484941450.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/fovojalijivow.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/zumexa.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/kakes.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/sezowutuwe.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/fudoturivemepatexod.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/rifumonopezu.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/1c9ev7r1vh79lfb2ga1g5sqqe7/pepigune.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/roxuzerux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=nancy+drew+ebooks+free+downloadPDF 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_off0000c29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC29A 18316 bytes
SHA-256: bf2b97254044e80212790ecedd822ff4e8c9070d75f5ebc971cb96775900a68a
font_01_sfnt_off0000f278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF278 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8F 10688 bytes
SHA-256: 6b2bcc0be108a9c9c018fdce4334b821646485c71c676460ba2964fe9c178432

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