Malicious PDF — malware analysis report

Static analysis result for SHA-256 e222828f9e1d73a6…

MALICIOUS

PDF

69.7 KB Created: 2021-09-25 09:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 69553ce45e8cbb0e516f006ee899eb9f SHA-1: cc3eb70ff67fc952a0b9c5506dbcedcf4c5ded08 SHA-256: e222828f9e1d73a69d62770497ee41ef1a912db752ecff4ebbbfa7d2756ddb34
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and numerous external URIs, many of which point to a link farm hosted on disposable domains. The primary purpose appears to be SEO poisoning or phishing by directing users to a large collection of PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 6

  • 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.
  • 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 http://savaksangida.com/resimler/files/bimozefimatuvelalavizatoz.pdf In PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/95656249360.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/37107142215.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/17100141698.pdfIn PDF document text
    • http://jonellchem.com/upload/files/10521551436.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/pozogikezul.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/mokebagefudevowawikevepaw.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/xomotodejudidijada.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/fijobegujigode.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421a2d99b12---fogexanu.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/xoful.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/64474424684.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/62720697857.pdfIn PDF document text
    • http://czyxchem.com/upload/files/47966096415.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/tuzod.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/32917427604.pdfIn PDF document text
    • http://ubytovna-krumlov.cz/userfiles/file/75257773351.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/febegegafa.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/54276638517.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/8044509381.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/81757945830.pdfIn PDF document text
    • https://krafteco.ru/uploads/files/255545594.pdfIn PDF document text
    • https://servauto.fr/img/user/file/livabo.pdfIn PDF document text
    • http://opuspointpartners.com/ckfinder/userfiles/files/33208654868.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/12028470663.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/dekebani.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=bergson+creative+evolution+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB17F 15032 bytes
SHA-256: 179d905366d2eec646f6fd3d8709debbbd7feb02ae12a20a7bd483562c75ae48
font_01_sfnt_off0000d7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A5 11012 bytes
SHA-256: b562d48c43c1dc811f5cbb03624d8a9c9cfe54fc1cbe66fe5e73a3f9501dafd0
font_02_sfnt_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1