Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb96863391522af…

MALICIOUS

PDF

83.7 KB Created: 2021-09-01 19:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: feb0f655eb7c6606ec12915e83182b66 SHA-1: 9a6c6286d7531b8bcdd3224430b79cb4a2d71ddc SHA-256: beb96863391522afa38c255152a8f63f90de2a18a33e0b4acb85c208cc2041c7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly indicate a link farm designed to redirect users to malicious sites. The embedded JavaScript likely facilitates this redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://hiace-yoshikawa.com/js/upload/files/14952414371.pdf In PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607daf4a45e59---67829734751.pdfIn PDF document text
    • https://emprenderem.cl/files/lumavik.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/17118242213.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/969912454.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612db6813d85e---57980344230.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/somimirixagufumifuninoja.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210620_6B676F5E71A6383C.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/sozenenegax.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160e67d5351e03---xisijawopamoba.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/30d7772ef2a4ce12067347444404e972/34317945611.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/maxalagedi.pdfIn PDF document text
    • https://iasvn.org/Images_upload/files/2628020801.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5cf977b2c---39889672410.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/675573343.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd243d7cdf---13868995266.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/4a35707f44866362ef5fb019c7b7b410/depajev.pdfIn PDF document text
    • https://alpinashop.bg/files/89619169391.pdfIn PDF document text
    • https://hagepoorter.be/files/files/bivarepikazixa.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d879fd87f1---vevabifad.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/gabowikarisugoniwafumizo.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/44816554854.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160841aede4dd8---60303666305.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/sozejepolikirisomu.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/1c181c742b26d11694d29255c60c57b6/27918202481.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=cooking+frozen+oxtailsPDF 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_off0000e2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CC 17572 bytes
SHA-256: 729b84d074210965efaa56ffb9685b2d21dfb28bd1886debb5133f6e42e7c1e5
font_01_sfnt_off000110ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E1 10672 bytes
SHA-256: 0557dda96aa38ea1b56390328f94845b46325a102f2dc9f5ecf4f4e8ca6686b1

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