Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb1e43cae931425…

MALICIOUS

PDF

82.0 KB Created: 2021-09-01 16:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bc6715b79cf3a1a1f97dd8ab4a4c8628 SHA-1: f4bc015e018f46ab7968be93c8e236c3f835e87d SHA-256: beb1e43cae93142564c3c48efcea30ee05c71f8dc1c5076467fd4144f588bf20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting sites. The primary purpose appears to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://beaszemin.com/files/94198991213.pdf In PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vvgth4aml6po56lv8037e6ojj4/pakokutapogorokifiv.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/b3calv1m708ivsgvqru7a4ofu0/47274971752.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/161095f5b26131---63269781474.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/sorutugojomuri.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/91197361275.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f9ba4f5f8df---38193830863.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/97246627729.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/temagipuvodexejide.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/kigigoturize.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/6370338134.pdfIn PDF document text
    • http://www.puhito.hu/uploads/sorogidixoxojazixebag.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/a2d9dc02d9eabaff9c5910656cd0a296/wisugubu.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/19568811783.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160917b446d1b4---65447751811.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/59408282989.pdfIn PDF document text
    • http://merwepizza.com/upload/file/50341048572.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/839ab5ba1550369bb000baa5bfd83247/52232878943.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/kukasaguraw.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/wabof.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/80080304927.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/suzad.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/74dc95e32a4441508192aad9cdf7d31e/49485930669.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/pipebatinidiwebizejasaluj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=itn+chapter+9+examPDF 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_off0000d814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD814 10436 bytes
SHA-256: 521145a637508690453a37b7cd4504b991122824499c6e4d657d145ff1974414
font_01_sfnt_off0000ef8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8E 18792 bytes
SHA-256: 314a626e25378689e7d4b1c8410db87da4ebaa84221e4766dfd16395a85997ec
font_02_sfnt_off00012025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12025 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1