Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a6cdf752d8d0272…

MALICIOUS

PDF

73.6 KB Created: 2021-09-05 09:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6bdd2128868d016a25090f666f784b8d SHA-1: c2c91ca453b744cf986baa13211151286127e345 SHA-256: 4a6cdf752d8d0272e2b586ca35e2a3a7d38e1ef1bec58d8b7a36ddcca507e533
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating it likely contains malicious content. The file functions as a link farm, with numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. These links are likely intended to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://allytemp.ru/uplcv?utm_term=website+design+using+dreamweaver+pdf PDF link annotation
    • http://liburnia.pl/userfiles/file/ginufofiragowovolotiroju.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/sulemajusojin.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76e4ce020---napujudibogufuzisokovifu.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7d5547041---gujivopelasifunu.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16070e6c47ff03---68429454022.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/74428563490.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9cfc4fbcc---wagexevafekavakewude.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/toximotutatuparakevalaxi.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/38416091737.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/94461111502.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/9d88df7ad096c650adca92715a7cb670/sapadugukidizupu.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608342bae0b0a---26485744660.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210606034207.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/dipadosavafiwuj.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ba4643673---78806030299.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/0jau6ku9rtr7tq548j7ai8klb4/muwubedojibesinuxeve.pdfIn PDF document text
    • https://sanidom.pl/img/file/37220155412.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/4psvtao4bpboupim7c8moo7omp/xonuripaz.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ev8ru2lsgiqc8d1mmrsvl2btp9/37401141878.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/ce9283915c339b15b4f6a9bdeeb42cc3/tomasidil.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/b478858b9bf5c5713717e18411dacfcf/67160780367.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/5714487697.pdfIn PDF document text
    • https://binhvi.com/upload/files/76608450772.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/41912170995.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/lokaxajamewavemefopa.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_off0000be84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD696 16008 bytes
SHA-256: b34c3099a3309dfe05442b0eabf33234512dee9fa33668f91feec845936c6220
font_02_sfnt_off0000ff64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 11060 bytes
SHA-256: 1948623607572dd0c17a3ef94528fa4e9a7454650339e6f1cbffdf5ddaa4532f

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