Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea5252a4aaea449…

MALICIOUS

PDF

83.4 KB Created: 2021-09-08 05:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4d4d2b5448dc6c9f0078f225b94b3730 SHA-1: 97fcbc8afc42fc705be6561014d15254460ff914 SHA-256: dea5252a4aaea449f2a59173d0c9cb72b8132e0ff4ceb372cd687e4cf62d9e5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The document body is unreadable, but the presence of numerous URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest the primary goal is to redirect users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/7a2qsjdefkiq0425rf45mi7bk2/xupemimezopinopokepexel.pdf In PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/24138300819.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5656bd8e7f---91602637915.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/xoguwawebelabadesoligipop.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/fusixejebisaketapageb.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/ferokasedoxuwotolek.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/dodupugeremomafonute.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be53e922db3---26932181890.pdfIn PDF document text
    • https://zop.bg/webroot/img/content/files/61644730314.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/64473282694.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/161100591ba932---tabazudiferugibadoniw.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/5086316768.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/24110392307.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/guwutofapabogerebur.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/96714221910.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a1e2b0a34---daduvenofekebival.pdfIn PDF document text
    • http://yuli-china.ru/d/files/bikivulifow.pdfIn PDF document text
    • http://hi-techfiber.com/userfiles/file/wesovemuferof.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/685ses9t1an1re9pilrjfjqul1/borotobuwibezikonofulolo.pdfIn PDF document text
    • http://neza.cz/UserFiles/File/pevawumepiwedu.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/426242774c5ce798cad76f0980647e7f/kafinigifukevinigibi.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202108291854534061.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16104810a93ad3---defuzijizegab.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/91507678119.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094089245428---tigadijolojewege.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=shortcut+keys+for+coreldraw+x8+pdfPDF 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_off0000d0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CB 11296 bytes
SHA-256: 10ad95c0a9e56b054b5416dca006cfd600fc886191d10faa83d0b9996f328256
font_01_sfnt_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B9 22868 bytes
SHA-256: 13be2a74d4fd1fa3139ccfa8ca7de0d065666318ec31310caef8e2fa65110c0d

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