Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c1886f5d71d1e9…

MALICIOUS

PDF

84.8 KB Created: 2021-09-01 21:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a01a47e01f946e8fca7d9dd49e5e9c7a SHA-1: cb18e19e274d1ba2140c5ea5d2a918de5728e3e1 SHA-256: e3c1886f5d71d1e9b077ceb14fb5836d4d3c463524ab0fa6dbc3e8602f6023bc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external URIs, many hosted on compromised WordPress sites and disposable domains. The heuristics indicate a link farm designed to trick users into downloading malicious files, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ketchas.ru/uplcv?utm_term=t7+wired+gaming+mouse+driver+software PDF link annotation
    • http://wangyiphk.com/userfiles/79448056953.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/65sbe37kcuo169esj76r34g5mp/96142058353.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/49110525098.pdfIn PDF document text
    • http://escalierdurire.fr/ckfinder/userfiles/files/16436078676.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962fa2866c0---90516098761.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/b340331935dde3cd4e8efe6fbae469f7/raxulinuxenarunopowabato.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/40999440235.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac46eaba185---78094372521.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/91758618715.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3904bbe376---jabonupulofifapudok.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/pabonolenokigodud.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14c8d10316---72620356051.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/kifobudiwif.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/tasax.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba04eace195---nutodefokaruruzuxuxofix.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/8e1b45175f675da8bf43fdb3281b096c/85919338645.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df2cbddb55---ranodezisus.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/05081386191a5cdc8f62b05a0df5a937/dakisiperebakubebedigizur.pdfIn PDF document text
    • https://led7.ru/file/6923825835.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/0afd152b1b1012c65bf892a9a2b867f4/99812240452.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/s7bush8q6c62aot3op8jaqt2k5/6746753605.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/luriwuposinumowelajasivi.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/19863912866.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/22760985484.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_off0000de9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 10916 bytes
SHA-256: a9ed2dbd512b3fd65846573175d7c6125d020e9f27ec30789f7ae226bbbb5873
font_02_sfnt_off00010fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE7 20432 bytes
SHA-256: 53598d453f7dd20a08d673110d86cae0378380e64d1fe0176a7abeb3e693f881

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