Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec261ab143e59be…

MALICIOUS

PDF

81.2 KB Created: 2021-09-10 21:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e493b0bf483dc60433306f16955b0735 SHA-1: e04f1f912d70645ae3ba4aa7a6a4fea619ef23db SHA-256: 0ec261ab143e59bef6a78d1a7c6e902e93204e0ff1eb8dcbe4b303bc7f9493ed
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, with high confidence. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The PDF also contains numerous external URIs, many of which are hosted on disposable domains, suggesting a phishing or credential harvesting attempt. The presence of embedded JavaScript indicates an attempt to execute code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/54bab635c8ddaa2a3989499ebd2a4440/tagiwuni.pdf In PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/baloxegajojavifu.pdfIn PDF document text
    • https://rwd.webseo.tw/upload/files/kijozewunuzasixivazawalop.pdfIn PDF document text
    • https://aurorabersinar2.com/contents/files/50474784800.pdfIn PDF document text
    • http://papienbanana.com/user_file/file/vanazizotigo.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/disodesudatoxipukonajum.pdfIn PDF document text
    • https://hobbyschuurtje-webwinkel.be/images/userfiles/file/59712396592.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/dopizixusofabun.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/gusuvuzedebagorusok.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/14359564482.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/13106423891.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/kubofulefogetarunejovi.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16138ac5a9174b---pafosajokagelixabilosaj.pdfIn PDF document text
    • http://snpwachq.com/files/js/ckfinder/userfiles/files/nurudijumalited.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/tesitofetovolapu.pdfIn PDF document text
    • https://leciv.fr/uploads/FCK_files/file/99179415211.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/gejanowulufewilajonu.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/sedoke.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/lepoluko.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/litebexa.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/48182648729.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/28748304561.pdfIn PDF document text
    • http://expnavi.com/sites/all/sites/default/files/file/47857485142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=download+into+the+dead+2+mod+apkPDF 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_off0000db10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB10 10688 bytes
SHA-256: 31f830c9edc8514551d98b2a0d2c73fc3a9742d26d72edd8feb05e60e8156300
font_01_sfnt_off0000f367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF367 16848 bytes
SHA-256: 6cabda3ef58f91d7e2e80b8f147369376ded00fef6d9335f352499c34fd380eb
font_02_sfnt_off00011ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1