Malicious PDF — malware analysis report

Static analysis result for SHA-256 8858a238ed1d000e…

MALICIOUS

PDF

81.4 KB Created: 2021-08-25 19:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4d744b9d8ee67eb0a35cebe4f712d1f0 SHA-1: d358b2f35f86f52bdda2bf1060cbf14ec964d80e SHA-256: 8858a238ed1d000ed218b81a746f21ee7a20247458c9958ce5e2c0f6a113b9e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a link farm with multiple URLs pointing to compromised CMS upload storage and disposable hosting, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the structure suggests it's designed to redirect users to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/0d29389eb2fa930db8a44d2ed3e74103/gakapozokigilenuzakeni.pdf In PDF document text
    • http://miltonhigh65.com/clients/874455/File/xuvilexup.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/f96232a0168f4bd4f2c8017325e837e1/15696687455.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b6c05c884---zukawop.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/pitulu.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/tme7s0us5hk70407evjvgi7t95/47706665164.pdfIn PDF document text
    • https://ladulceseguros.ar/noticias/fckeditor/file/14223971084.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/85776021943.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46bf2bd2c9---gujamesabino.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/19003203942.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/fexeta.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/nimuxevosolabijavowivekof.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be04240518b---gebijeravovobijij.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e6f52266c---59451699802.pdfIn PDF document text
    • http://riceart.ir/basefile/files/poxuwogigalore.pdfIn PDF document text
    • https://tch.lu/files/files/19400643408.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/868h9ogg7tgqnginljmm8rnosp/mevaxebuwomepenujejesiwom.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/013959d46970749a57c00eb79fe13dad/48847136538.pdfIn PDF document text
    • https://digireg.si/upload/sunupewuguduboju.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/sedavumijajulebuxaxiwed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=can+i+eat+bread+on+a+low+carb+dietPDF 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_off0000db11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF323 16448 bytes
SHA-256: 911352660669114b7a8b1121536bdd62651f18ca99a527eedd2a2f364c8befd6
font_02_sfnt_off00011dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD1 10452 bytes
SHA-256: 36c4a0e707dc85e2a1d08e6f2820934b2335a338e2010fed053aff3f3e8984eb

Open this report in the interactive analyzer, or submit your own file for analysis.