Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9247178b852004…

MALICIOUS

PDF

81.7 KB Created: 2021-09-19 17:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 805b2ba5a1352943f7034561a416fa11 SHA-1: 613c92857afe3730e342ad45efc6a40764acc12b SHA-256: 6f9247178b85200426d048f0c3cb9e94041dbcf0a66a9878fd0d5f8d47083b98
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, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malware or unwanted software. The presence of embedded JavaScript (T1059.007) and the nature of the links suggest a phishing or malware distribution campaign, likely delivered as an attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://epoxidice.ro/mm/file/wepasazu.pdf In PDF document text
    • http://beiwendq.com/data/attachment/file/juvugavifaxibuver.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/36776890826.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/doxizironep.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/perinitolikinoliwopotin.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/rujeziwuxejutowogijubun.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/bewuxuwerupuvofalegirego.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/mibilur.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/65790025664.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/68321638688.pdfIn PDF document text
    • http://mebizstekla.ru/userfiles/file/96219883472.pdfIn PDF document text
    • https://harley.dataroom.tw/upload/files/29142684926.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/87883224168.pdfIn PDF document text
    • http://lukinserv.hu/file/82614536338.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/wapugobemop.pdfIn PDF document text
    • http://yjeverspeed.com/userfiles/file/70562313704.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/29020196184.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210914044326.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/buxuzedefaxalusozo.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/sibaduduxore.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/79876227477.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613d120111fa1---52216843440.pdfIn PDF document text
    • https://hse.tw/upload/file/sogilaxoxojifejuvoxurores.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/83201500016.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=snaptube+free+download+for+android+latest+versionPDF 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_off0000d950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD950 17752 bytes
SHA-256: bbae843ed9db99a6a5d5dd8fd354b715f572e93d09b35dadf2f726efd203ab79
font_01_sfnt_off00010745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10745 10956 bytes
SHA-256: daa1f52c0881d76419f55e31837f3458ca076a1278f97e18366bcfe567decdd3
font_02_sfnt_off000120a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1