Malicious PDF — malware analysis report

Static analysis result for SHA-256 786007df4c61e913…

MALICIOUS

PDF

82.5 KB Created: 2021-09-18 17:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 48e181960969d55b3b74143f257450ef SHA-1: b8c292d2c2a7db3778bb44791be219b702da465b SHA-256: 786007df4c61e913fda9c0a630a9a86ae7bebc36bbd52931226e4570ecd2fdf1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of numerous external links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://huntic.ru/uplcv?utm_term=how+to+install+sd+card+in+android+phone PDF link annotation
    • https://bio-obst-und-gemuese.de/userfiles/file/23846567989.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/23162ed2b442045cf7e31a24dbca6eaf/fifumisegeba.pdfIn PDF document text
    • http://luligang.com/ckfinder/userfiles/files/nagitetufizuwudu.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/cdf3e9b35acc378751bc34782fc8b9d0/66466225637.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/58265577734.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/vovisativedekowop.pdfIn PDF document text
    • https://equimat-cheval.fr/file/82303971686.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/4a6c8b6b4e01dcf9376b8fc27fb307da/rexasemire.pdfIn PDF document text
    • http://erdemlerkoleji.com/resimler/files/tezegupigavefopas.pdfIn PDF document text
    • http://greenld.com/userfiles/fozarus.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab8e2790b5---24066386708.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/91355108760.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/6029881157.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/paninelubimanusejasakepuw.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/podaxudimadewosifiziv.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/70737485587.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613716bf38a61---rasekano.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132515043392---1178979675.pdfIn PDF document text
    • http://tnslib.su/userfiles/files/jabarinuvevejoretu.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/84205441939.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/gudusomuk.pdfIn PDF document text
    • https://alstar.uz/images/shared/file/14820348300.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/14941257811.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137554e615da---rofix.pdfIn PDF document text
    • http://apicn.net/upload/files/mafojijatut.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/kafekeravofopom.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_off0000dd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD85 10688 bytes
SHA-256: b81f39c0493fa7999d5626303bde8abbae9b2f14b064f0cc1135c9a084b12e34
font_01_sfnt_off0000f5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0D 17580 bytes
SHA-256: c4675135b9d5da3357f2307f171f016fc038510f6da22b6b813dff5841ca91ca

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