Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9a8d91f1ad6bf4…

MALICIOUS

PDF

92.9 KB Created: 2021-06-28 04:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 177fa4f97af1431b87497beb600416f7 SHA-1: 0c1aed699cedb6cfe7cf927c809a4525625126c6 SHA-256: 6e9a8d91f1ad6bf43f3e3728572009428c26b4896c0aceddab34704120eb0978
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm structure, and 'ML_NYX_PDF_MALICIOUS' along with 'CLAMAV_DETECTION' confirm its malicious nature. The primary attack pattern is likely to lure users into clicking these links, leading to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://ketchas.ru/uplcv?utm_term=lcm+of+2+8+and+10 PDF link annotation
    • https://artlabjo.com/userfiles/file/pugefasitilagiwume.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/mnr3g50an1mp5e9gch9kgnb5c7/kakirobixoduletijiri.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/nitesizipukifukefedod.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/49odrag0irmo5o0a0jeci3vbga/54372112029.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///lewefosigapupalava.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/292231f5833ebb05906bc1693d0a7ddf/seduduwebiwelijalokogut.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/78182809028.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/92a87975dfdd4683033d401235d4eb37/2133392546.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d0e60daa6---bikudizu.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/d2d63b2f6adc5019fd7507773f974d7f/44222785198.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/80747945080.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/a3e40a49b111e3f951dc0e71193c9b23/40340887705.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/613bba13073b59293ef570a25470867c/xunamugige.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16084aa5093380---77190174959.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/45683034585.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/0ee851d78339021874594e01928f4e8e/5978042235.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/2c93eb5ce6d0ea3556d27ae614ff0b9a/32195120273.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087df720b39e---60139488566.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/vasosebefakamo.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/7830526e4df047abe782600218c91acf/welololuwogarafeleka.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/74539130550.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071d2578bd34---67093415429.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608609d4dca46---68463381849.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c63a6480e---labasakoj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10945 10460 bytes
SHA-256: f668e0bab65a3daa13cca1c8487cc9219a6fbdc6b44fe2c4268eb0728e7507a6
font_02_sfnt_off00012111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12111 16248 bytes
SHA-256: 6c7e1b754cf38ee70ad76cb780c90d71dc4ff6fc3e14eab78a91c98fc4406452
font_03_sfnt_off000136dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136DD 17864 bytes
SHA-256: 7e66fe24592e5633d222d7cb3fba32da98a775874b2b19f7fa4c3c2f4056377a

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