Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4a3d206f9e9ec5…

MALICIOUS

PDF

87.5 KB Created: 2021-09-14 23:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d3c1793779fdce55297d9dc7d6b69aaa SHA-1: 0ff4e05eac18cc80000ea895e5555081544d0371 SHA-256: ed4a3d206f9e9ec5c95d68c5c0b1894fb474fa99c0322076d0a4035c20498663
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=gangstar+new+orleans+openworld+game PDF link annotation
    • https://eseninternational.com/uploads/files/29295189610.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/99645328641.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/89211593924.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/toxubifelomolajij.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/96069746004.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/21423300864.pdfIn PDF document text
    • http://farmandari-sarvestan.ir/images/news/files/rozubesuju.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/54135143228.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/rimogid.pdfIn PDF document text
    • http://sireny.net/share/files/bedixevawog.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/kikidolisutu.pdfIn PDF document text
    • http://sushibelovo.ru/files/wixaxoteripuwubunoz.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/tefawuvidokubema.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/52208650315.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137bc10c98d2---20690894316.pdfIn PDF document text
    • https://milorem-service.ru/userfiles/file/26123942709.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/disaninadivisuvatowa.pdfIn PDF document text
    • http://360global.ca/userfiles/file/rimamotamajibexifuv.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/pigiluwekiwi.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/xodefujejusox.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/32200656225.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/10144884633.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_off0000f08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 17968 bytes
SHA-256: 7cc2612f77a8d0f1eb215d2998daa53bb8f0922ad3fc1f5c602451addd5e7cc8
font_01_sfnt_off00011f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F46 10768 bytes
SHA-256: d486103e3cab095965ae928e4797d851b3c7640af5b4ea2ba0829a7174caf7ac
font_02_sfnt_off000137f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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