Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2cc6a991c340ecf…

MALICIOUS

PDF

81.2 KB Created: 2021-09-16 00:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 92ec70cd3b956c73a27c153cdd89790d SHA-1: ebaa0eb55cee8ce123ff32346c2dc6d73b39d7d5 SHA-256: a2cc6a991c340ecf35c652eeac9364bfb7f15a02be8475da2ea618a89f36ad47
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for executing malicious code or initiating downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://inwebjor.ru/uplcv?utm_term=google+camera+redmi+note+8+download PDF link annotation
    • http://propack-th.com/image/upload/File/gugorinusumokekagi.pdfIn PDF document text
    • https://pvcmikser.com/upload/files/gosagap.pdfIn PDF document text
    • https://galaxytraining.examinationonline.com/files/mijiruke.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/gujerasojusaka.pdfIn PDF document text
    • http://www.centrosanmarco.eu/img/news/files/82200176834.pdfIn PDF document text
    • http://dopuskvsro.ru/UserFiles/xagujuzarunad.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/lufesetitozepo.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/zafivenulevomogeka.pdfIn PDF document text
    • http://news-hk.net/uploadfile/file///lesadefefumuzimup.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/62519859202.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/4508389420.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/30465187935.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6d690844e---2687428408.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/5750468f771b9a38c14e193630aa18dc/20500033403.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/xubedatinuluzoxip.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/68531490174.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/90325783768.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/rafubenobula.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/pevefu.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/sijalijedabasolinemogesu.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/20658039809.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/movusixotodejoliw.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/zaxoxikamimadugofifatekik.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_off0000d6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C8 18188 bytes
SHA-256: 36cc90fd81c69da5aa32c3e206887cfb2e50f0075442a99ac182f1a6db4453b8
font_01_sfnt_off0001062b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062B 10876 bytes
SHA-256: 8dec6dd66b1a57741e0246b21886bf859c66e3190934e2f2c64c9e7bf74c1025
font_02_sfnt_off00011f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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