Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee246a457bd9532…

MALICIOUS

PDF

83.0 KB Created: 2021-09-01 04:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f10d19e42112d1d57b880582e2294321 SHA-1: 94325dc4b9e690c7927816f52c95779c6cb4c6dd SHA-256: bee246a457bd953232357c28bbd065e7369f9ae55a725512a1fef4ef1cc402e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content. No scripts were extracted, but the presence of multiple external links suggests an attempt to lead the user away from the current document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://nomylo.ru/uplcv?utm_term=step+by+step+math+word+problem+solver PDF link annotation
    • http://meruzhankhachatryan.com/app/webroot/files/file/96680779537.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/13858461615.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9f53aab9a---vugokafafonerefupun.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d885a04f49---36041326556.pdfIn PDF document text
    • http://iscyber.com/userfiles/files/zoxuvumulaxevonekigu.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160975b43bbff6---54697755971.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/725345b54508b052aa858af9ca167bbe/55587226641.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/dpam27eg3srd0phteta69mbnj8/jeworimekakolaxune.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/2324264036.pdfIn PDF document text
    • http://qca.ch/userfiles/file/22189679242.pdfIn PDF document text
    • https://egf.tw/test2/images/file/firazekisigamategutudojus.pdfIn PDF document text
    • http://pooq-design.com/app/webroot/fckfiles/file/21132352723.pdfIn PDF document text
    • http://maxkbm.com/clients/2/28/28fcaa936e2ecbeb6c9a97ea0f1ab253/File/47450869230.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/jewajanuv.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/84435393241.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/25037407634.pdfIn PDF document text
    • http://metapolar.hu/tmp/pusadafijukizulemubepetu.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/didijuturakosoxo.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080618cc771a---fufuzodapovepofajoro.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/883886d2955eff6a602cd9a2ce4f16e6/97389743989.pdfIn PDF document text
    • http://vce34.ru/attachments/file/84570349561.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/48947144136.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/5090787d643ac29266850170f7c46a6a/vetibadazaz.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ehdcqjl04od5tmvle6u87kncj7/63399156845.pdfIn PDF document text
    • 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_off0000de55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE55 18000 bytes
SHA-256: c3f0bac4c6ca98c234a75ff5dc8ce90ecff0892bb316ec581329bac01b16a735
font_01_sfnt_off00010d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3E 10944 bytes
SHA-256: 345ba7280e3aa669e395576c2dd466c1946f16ec597357788a2423d3d684bc46
font_02_sfnt_off00012680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12680 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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