Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e7bfa2b05c7f81…

MALICIOUS

PDF

68.9 KB Created: 2021-09-17 09:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b5092343946ac8b15670792077f0829f SHA-1: 25e0cd767dbe9d30c9cddcf371047805fff39813 SHA-256: 13e7bfa2b05c7f81a2fe67e864706c37e7f52e0cebdc615e0aecd2425e5c2bdd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to PDF files on various domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection or download of further malicious content, while the numerous links suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://kronospan-mofa-hungary.hu/editor_up/86603927983.pdf In PDF document text
    • http://www.examnotice.in/uploads/files/getekorawufaw.pdfIn PDF document text
    • https://tutorbolivia.com/userfiles/file/76314854502.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/76202859289.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/fodajewefoxav.pdfIn PDF document text
    • http://kmsenior.org/file/files/fovoritetan.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/vixorigenibirowogapa.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/pajopozujizigazidovosu.pdfIn PDF document text
    • http://oumkua.com/userfiles/file/voniroxexisuwiku.pdfIn PDF document text
    • http://www.martiusstaden.org.br/js/ckfinder/userfiles/files/reguromu.pdfIn PDF document text
    • https://chambres-lannion.fr/userfiles/file/sebakamidifejudoduriz.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/nekigidebode.pdfIn PDF document text
    • http://specimport.by/files/files/14346223271.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/49793334685.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/dasip.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/54980649283.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/xanux.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/terixijarepetipamabepuko.pdfIn PDF document text
    • http://stnicholasway.com/userfiles/file/zivowatagobenalo.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/56399653968.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/kanowifupuliku.pdfIn PDF document text
    • http://recviem.ru/img/upload/kirosiz.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/pexigu.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/8199495805.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=tubemate+app+download+linkPDF 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_off0000b1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EA 14232 bytes
SHA-256: 2f1da00900f6ca938621e586d9ec091bf63e32b898faac179957283f58f757e2
font_01_sfnt_off0000d574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD574 10664 bytes
SHA-256: e01c0fa4bb48f1df2f2af31d4ad1e1f11941d9a1fe650368d40c50ac7d2ae608
font_02_sfnt_off0000eda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.