Malicious PDF — malware analysis report

Static analysis result for SHA-256 230ca0f4116abe18…

MALICIOUS

PDF

80.1 KB Created: 2021-09-09 00:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 458495b992a13254e2d08e523a34f62c SHA-1: 8fc862e1d6003d7e37935b169662ca787254836c SHA-256: 230ca0f4116abe189ee53d34bd47356c29f3c89cf644b1023ef941d5f99d2ce8
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://alarouba.com/ckfinder/userfiles/files/47783310003.pdf In PDF document text
    • http://futuralagoparking.eu/userfiles/files/wedejifuson.pdfIn PDF document text
    • https://red-adlay.com/upload/files/vinumaxu.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109020449238058.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/mijipeduluxokosuxapijexoz.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/refanuv.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/walevujas.pdfIn PDF document text
    • http://refah4ter.info/basefile/hotelrefah4terir/files/45092419012.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/zuretapijisufejonude.pdfIn PDF document text
    • https://specializedfacilitymgt.com/public_html/userfiles/file/dilolisaxavir.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/vapaxodudu.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/74470614953.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/93376470185.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/99248870958.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/750f586203ef33d656ca9b4eed8010dd/bakapaxivewamibonutuj.pdfIn PDF document text
    • http://creationart.hu/files/file/dasoves.pdfIn PDF document text
    • http://newkontakt.ru/userfiles/images/file/57616736589.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/44468991094.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210905/files/20210905140443.pdfIn PDF document text
    • https://ip-pharma.net/data/files/piwefilepesu.pdfIn PDF document text
    • http://grabnerestriche.at/87747326757.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/radizalojovonokori.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/7913062365.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=download+infinity+blade+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57F 17448 bytes
SHA-256: 936b3d34e986401968c958ec1572ac4e9210f850b484569d57f93e5d448dec8c
font_01_sfnt_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 10520 bytes
SHA-256: c39b71e4d38bcf06ecd84e95124242c35877a84bc30629310b8139af0511c0f5
font_02_sfnt_off00011b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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