Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e39eec1b8d074c0…

MALICIOUS

PDF

83.4 KB Created: 2021-09-08 22:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: dd46c91a7e4db3d0b513966e610d0a2b SHA-1: 802295e46bf07f882e4c797d30e19ad707dd0424 SHA-256: 0e39eec1b8d074c0f7b5e39428de9a0635f4ccb88cd8d8c3ca29d92c000e07cb
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 0.9860

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://wastran.ru/uplcv?utm_term=the+secret+book+review+pdf PDF link annotation
    • https://sunpower.lv/ckfinder/userfiles/files/87127696536.pdfIn PDF document text
    • http://rc-modeller.se/images/file///22948002020.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/35307338669.pdfIn PDF document text
    • https://eetravel.net/file/lizosaxafegij.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/ratojokaligefumixo.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/vajonudosorolape.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/kidujotitoxolalexes.pdfIn PDF document text
    • http://superbarter.sk/media/file/75203029862.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16137c3fbafe45---24860788363.pdfIn PDF document text
    • http://pololanna.com/user_img/files/jomugimimuva.pdfIn PDF document text
    • http://schokobrunnen.com/idata/84464086792.pdfIn PDF document text
    • http://mariancozma.com/_user/file/vopabomafizozutebuje.pdfIn PDF document text
    • https://kotata-zlin.cz/obr/clanky/file/10309345442.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/99904030005.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/89446079388.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/74273284236.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/15175799678.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/26740997522.pdfIn PDF document text
    • http://kag.fr/userfiles/file/gurarakagakajexa.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/motepenuvejifavinapela.pdfIn PDF document text
    • http://spakimthi.com/upload/files/80597771889.pdfIn PDF document text
    • http://watchimport.eu/userfiles/file/rarax.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/fabijed.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/vilobagagovat.pdfIn PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/93832063898.pdfIn PDF document text
    • http://surtek.biz/image/files/20150323_191954.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_off0000df75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF75 18708 bytes
SHA-256: 3ce8a7ae2851c99f798bb3842a7fbc0fb2bc502a894be79768b1dbcb512c9126
font_01_sfnt_off00010f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F20 10752 bytes
SHA-256: 6f724d1ae3f24b76d870608e0f3d0d0a980c4b8d77ab7a5d247959324e522dd5
font_02_sfnt_off000127e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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