Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abfd219e336261b…

MALICIOUS

PDF

70.7 KB Created: 2021-09-24 21:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a5f7657240ddc619d8f8212b915e1ba6 SHA-1: 903bd42e516476993d9bbe53c1ed0515177aa95e SHA-256: 9abfd219e336261bf631251afaccf027896c8f30c00772c9d623b6ce7ec2bff8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to disposable hosting and are part of a link farm, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a spearphishing attachment designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://garglob.ru/uplcv?utm_term=adding+google+play+services+to+android+studio PDF link annotation
    • http://aan.kz/ckfinder/userfiles/files/fagefefedukamivijup.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202109160957000670.pdfIn PDF document text
    • http://oazapiekna.com/zdjecia/fck/file/32779009071.pdfIn PDF document text
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/41361150493.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/42884371437.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/34878124978.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/xexuzapibipat.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/nejugufe.pdfIn PDF document text
    • http://cuadepthanglong.com/images/ckeditor/files/gevudodazibadezulobixux.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/vawexuxiwuzafe.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/zesilopemifowijirefado.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/pitakidujomuzunis.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/jurijopepilowuv.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/vesusajarakabitola.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/sonazafize.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/96931380320.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/33206342883.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/xamegowadolukamana.pdfIn PDF document text
    • https://graphicart.ro/fckfiles/file/37818409855.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/57200570549.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/dasivonokiba.pdfIn PDF document text
    • https://hijaulumut.com/contents/files/zexages.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/miliwir.pdfIn PDF document text
    • http://paraleumarian.ro/app/webroot/files/userfiles/files/83126924072.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161466a6e6ba01---16002189131.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_off0000b3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E6 10948 bytes
SHA-256: d1c75f904c27868e61527259348d17b1c03c1970bdca6e2dea41027fc2c2c38a
font_01_sfnt_off0000cd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55A 15384 bytes
SHA-256: dbec19c33c6843dcd05fdd34a04874d9797378bc6d813488e1c73ffd693e0ccb

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