Malicious PDF — malware analysis report

Static analysis result for SHA-256 46695afafe4ae306…

MALICIOUS

PDF

81.2 KB Created: 2021-09-18 21:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3ff68777620684db3cf3cdd9b3e2753b SHA-1: 4ca8a4f46447102a335bea2e34703b5e37f7d6c0 SHA-256: 46695afafe4ae30602e77a686198f2350ec26f7ea6080aec5dc31236fce30ac0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://philabc.ru/uplcv?utm_term=vijay+superum+pournamiyum+torrent+download PDF link annotation
    • https://at1-turbo-j3t.com/contents/files/rumijolu.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/rezotasaj.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/rewipibalowebojoketepola.pdfIn PDF document text
    • https://www.edm-medical.net/ckfinder/userfiles/files/42665741953.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/41783014227.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/bagavanobosazawebegazoso.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/sivifufikotozufuwaxixu.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/89753914676.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/juxavizadazuvigufikasepa.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/53090329213.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/85406913811.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2b569e5ce---morupiluraxisidunegol.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/25241891966.pdfIn PDF document text
    • https://limberhurstgallery.com/imageuploads/file/zexureje.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/senigad.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/gikunakekugej.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/5569209200.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/nepedalazotemu.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/kiwotesax.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/47941709707.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/be16d877f4d4c830a5cbb4afaf01549d/zobixalovewares.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/zepisavoselafekolu.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/20752284180.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_off0000cb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE374 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_02_sfnt_off0000ebff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFF 10952 bytes
SHA-256: 7c6ddddf5ac41197d0a9e30e4e8653507649e0775206ae3838d0803645f75add
font_03_sfnt_off00010562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10562 18704 bytes
SHA-256: e2637d75314e8d2a09f21f7d86aa85ea51a67b1b610ea39773e04b8627f9ef54

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