Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3259187ea976a4…

MALICIOUS

PDF

76.5 KB Created: 2021-09-13 06:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 48ace81a163aa2656cf46231ae82bd2e SHA-1: fc0c455d33ec4148ec608d37c9907abd188a0d79 SHA-256: 6c3259187ea976a41e79820e92b39d3b2c93a8f736756306af73ad017efb20f8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, so the primary attack vector appears to be the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://abwingsmd.com/uploads/files/80654367020.pdf In PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/1cb5353a65af1a0cd22adba7931c30af/lovipaveworu.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/72922294019.pdfIn PDF document text
    • http://mc-opony.pl/files/file/70600453486.pdfIn PDF document text
    • https://phnews.ro/files/file/mojunipovuwerepiful.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/85316862593.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/62788220495.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/65564652260.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/67887916619.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109100354321439.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/88377865933.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161348404bef76---77150825248.pdfIn PDF document text
    • http://vincentianssjp.com/userfiles/file/49053485729.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/10244672230.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/gopake.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/fupudifofujekutajofogiz.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/vuwulumepe.pdfIn PDF document text
    • https://anfauglir.com/images/file/92948592942.pdfIn PDF document text
    • https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/6236507145.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/557101391.pdfIn PDF document text
    • http://sial.pl/galeria/file/givoxumop.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/jixorapimenono.pdfIn PDF document text
    • http://aguito.madteam.net/ckfinder/userfiles/files/27414253225.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/gasadexore.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/73097287914.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=picasso+movie+app+apk+downloadPDF 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_off0000c8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 16628 bytes
SHA-256: 2d1a807fa40141de27f6516fedf13f15bb0b6854f5626aab2d0f5b689866d37b
font_02_sfnt_off00010b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7E 10720 bytes
SHA-256: 13f9d079702c3e6067abd9a775169101af19d871db2b53770b7739b177042bd9