Malicious PDF — malware analysis report

Static analysis result for SHA-256 956077fea6a0a34c…

MALICIOUS

PDF

80.0 KB Created: 2021-09-17 06:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ac5221188fe8585a1cc713747fda5c43 SHA-1: 86914318f400fce016157827b20d54e999414b8e SHA-256: 956077fea6a0a34cbda2b7b681b945c415f1f56d01eadb6bf0d4ea85af33112a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external domains, suggesting a phishing or redirection scheme. The PDF structure and embedded URIs are consistent with techniques used to distribute malware or lead users to malicious websites.

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://pixomot.ru/uplcv?utm_term=my+cafe+android PDF link annotation
    • http://www.dgtrans.co.th/login/ckfinder/userfiles/files/povulimusepukopob.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/87398229179.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/82817522955.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/posurepexusu.pdfIn PDF document text
    • http://maimungkorn.com/UserFiles/file/76345677904.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/dorerezapuk.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///kuzagidolofesa.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/2605963569.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/5587713664.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/vibikofipisofu.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/31107270912.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/xolidep.pdfIn PDF document text
    • http://ippon.lv/uploads/File/43327967787.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/magumekenugoxigumavokod.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/54926020734.pdfIn PDF document text
    • https://12waktu.com/contents/files/kotog.pdfIn PDF document text
    • https://solturism.ro/images/file/53069981932.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/44097161755.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/21727061234.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342478141aa---60065223103.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613271f51c020---mabafunadunelem.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/bolele.pdfIn PDF document text
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/xubig.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_off0000d2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D3 10264 bytes
SHA-256: 241c46df16d88fa846f133e6c1ba2d9bbe3ecf29dc1ad39837a5e4b4133cb996
font_01_sfnt_off0000ea02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA02 18720 bytes
SHA-256: 147b3ca51c98efb40dee9eee93233f73e8e732abc97fcd4ba49cb3d2663de6fb
font_02_sfnt_off00011b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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