Malicious PDF — malware analysis report

Static analysis result for SHA-256 716155570cecda4e…

MALICIOUS

PDF

69.1 KB Created: 2021-10-01 08:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 40c8ec7a3779a77859f360e0a7b31279 SHA-1: 5d1c0b9f506232008de5cfc5214d8f8442389b22 SHA-256: 716155570cecda4e1cb9195253e7255211432f98ecc0fa62db176c88f29a3fac
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests it is used to facilitate the redirection to these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/molazoxujuka.pdf In PDF document text
    • http://fiumaradelsossio.it/userfiles/files/46951706595.pdfIn PDF document text
    • http://ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/65806308826.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/xerenujiselilamamejexuk.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/nokitiw.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16141639e2232c---fepepiginu.pdfIn PDF document text
    • https://kohphanganhotelandtour.com/userfiles/file/29232482493.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/lofulorotagifinu.pdfIn PDF document text
    • http://herve-coiffure.ci/files/75287731835.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/66543372116.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/22263913229.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/mifujigesofuzolelajujifil.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/jusedanotufu.pdfIn PDF document text
    • http://heizler.hu/files/file/23478528661.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/wopujazobutesopaweralix.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/56171538964.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/65344761181.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/23236445191.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/83998934052.pdfIn PDF document text
    • https://medius.sk/userfiles/file/pufatilizi.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090518114073499.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/tuwepo.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/6478ed2db734f3aa3bf1126aeafd6aa5/76800525354.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+open+numbers+file+in+androidPDF 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_off0000b0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D8 10976 bytes
SHA-256: 8f8b46e8c54b33dcb1def67da501ab837d6130b1c4c017ee1a00c7f112492229
font_01_sfnt_off0000ca17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 14548 bytes
SHA-256: c587d38f15f3af78cab8088de2e25e6d83d1ff2627cbe49b6b8a6a91d8425b2a

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