Malicious PDF — malware analysis report

Static analysis result for SHA-256 e081e1b53fb6fe0c…

MALICIOUS

PDF

78.9 KB Created: 2021-09-05 06:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a030e1637ab62331df2ba4d21a017a33 SHA-1: 2de7318a0fa30629f2d637367664d71d88ce57c2 SHA-256: e081e1b53fb6fe0cbfbb2bca7a233e3b799db4f9c0f7968e007c5014755ed56f
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The primary function appears to be redirecting users to malicious content hosted on these compromised sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133d85a6592b---latipikodasasab.pdf In PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f5463278b3---23377177920.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160df53232ba24---zafepojosegopuxidoga.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/93405893101.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16076db750527e---zasezulusilafa.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/rixisidumufabezizaw.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/mebufavojanesovos.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/g5u2qfpj6vr5kp86ihdfupvrbp/paturavaselefalopoz.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/gugadazaninetasoxalikazad.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/zusewa.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160982dcd98c55---11935887763.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/a503f54c3f9cdfabd59517e17d1e57c1/87852027156.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/03632cebeba58a4d3af35a526ca941a0/womaziruna.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b700be6d7dc---maxurujinupod.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c817a80bd4ad796046e9286fe9bfe9d9/10294649198.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/pabivotipiwofiwatif.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/c48c0015f3181a9cdc78cdcc9b95c0dc/95957197438.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/62226002290.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160941d45142ee---93282357915.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/7756815160.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/ace6b8f7a0d9f987a0c30fcb64af5cb7/74841117450.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff37a8ce49---nakemasegufeti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=odia+song+lyrics+pdfPDF 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_off0000d0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A2 17720 bytes
SHA-256: d86e10b885c0a8f674f72addd41a693ddf7ae6fcc9808a49d49895c3997a5194
font_01_sfnt_off0000fe10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11627 10704 bytes
SHA-256: ba9ca61bc6a1bac0dbd8ab3a53cd1d10e3e3030631e3294566ba0b5fb1f1771e

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