Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ac3b356fe18f1e…

MALICIOUS

PDF

79.7 KB Created: 2021-09-10 07:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 42347a3b8ba42cc39a5292a2c9cbee14 SHA-1: c800892a5e357898643e28832e375fbc4eb586ea SHA-256: 89ac3b356fe18f1e10378930cd2b1e55a2dfc55b9a3f5b942fef776be327274e
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous URLs, many of which point to compromised CMS uploads or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm for SEO purposes, likely to obscure malicious redirects. The embedded JavaScript and the nature of the URLs suggest the document is designed to trick users into downloading further malicious content, aligning with phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ketchas.ru/uplcv?utm_term=bester+cache+cleaner+android PDF link annotation
    • http://nhactheducthammy.com/upload/files/wepelupexusozo.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/280891152.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/retiroxagufinerabikuxi.pdfIn PDF document text
    • http://hepiran.com/cache/fck_files/file/laxuxukevakuva.pdfIn PDF document text
    • http://h04ydivan.ru/userfiles/file/lufijevapezikokijumozo.pdfIn PDF document text
    • http://nghiencuuykhoa.com/uploads/userfiles/file/37819333280.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/a9b44f7771f9eef831f426936203c1c2/14797815925.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/53800164875.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/donamumoja.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/nigadurisoj.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/38858095036.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/47235091067.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/telozubikamojafogipirot.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/kavinafafixugosomusigus.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa096dc136---25210714899.pdfIn PDF document text
    • http://cga82.com/admin/File/4169599816.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/37407786891.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/xiwesisagadenetekisupix.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/17662167886.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/b93c38c162f0d459b5b085433f73b919/26771432538.pdfIn PDF document text
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/16546918200.pdfIn PDF document text
    • http://samtekelektrik.com/files/zolasogoxe.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_off0000d299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD299 10520 bytes
SHA-256: 9a6a5aae368991b74587917499f47399a9bd451ee083dacec14c0b08facef3e9
font_01_sfnt_off0000ea81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 18100 bytes
SHA-256: 555480c623c0347aadf209f309c8d25651747463da7b0ff97d36e4894c7d539b

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