Malicious PDF — malware analysis report

Static analysis result for SHA-256 613e49e48a4011fa…

MALICIOUS

PDF

81.7 KB Created: 2021-09-08 05:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1a65894eb23a852975e2d41daca5f175 SHA-1: f0b4a4d31cd6f68a292beb3231df73b02a3c1758 SHA-256: 613e49e48a4011fabd0e88476d36522fde19601bbfbbfa795f1144cdb53cdd1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing a link farm, a common technique for distributing malicious content or conducting phishing attacks. Several heuristics indicate the presence of numerous external links, many pointing to compromised or disposable hosting. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and link farm strongly suggest an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/8de1fb3d4196b059c0112f11f71d2bf0/tenavulozilagukizewo.pdf In PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/16328985391.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/ab50cd50fc8e8320da899b84ad718b37/93786897860.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/74itvnqqqjlvfa0e9frbm92at1/29693674558.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/valabupinodu.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/53074530314.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/duwawapimezedazodifeva.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/8e87cccfbfebe6a1c4b53f85d347d4a6.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a758543ed0e---lojitugavugubar.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/debiwofixajus.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbbd51a756---78491525820.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/5216311818.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610ed59f0202c---88335349398.pdfIn PDF document text
    • http://minerva-collection.net/files/files/62647885960.pdfIn PDF document text
    • http://acelybio.com/upload/files/jobuwusojokub.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/48987954382.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160da1728d062a---93780717784.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a970d46b263---puxir.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/33982537670.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/2en0o2vkpd3dkevqnqer1rg12d/69947739972.pdfIn PDF document text
    • http://2020kellyfamilyreunion.com/clients/1/1c/1c0e63424c3b5e20a3d858f77c59864f/File/bisigigaku.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/73312627381.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/vj74hjbikh1nmjltds5138093k/69657179900.pdfIn PDF document text
    • https://edbcagliari.it/file/roletavimesebevaforonod.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/4302301583.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/sisujijexebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=human+body+systems+worksheets+for+1st+gradePDF 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_off0000da40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA40 17472 bytes
SHA-256: 1d32842e0e9c3b4929fea730fc1edbb2ade2c0252e104de0e6817ea524a7dd06
font_01_sfnt_off00010730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 11236 bytes
SHA-256: ff4b4335ae08b5bc1e547aa59b9fb2b5452c17e87598ed90a2e739d2bdda694f
font_02_sfnt_off00012147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12147 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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