Malicious PDF — malware analysis report

Static analysis result for SHA-256 094558aba5f5f988…

MALICIOUS

PDF

84.7 KB Created: 2021-09-20 05:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 272d8a99c6b1efd1b6e793c7f31edf75 SHA-1: 487f2246ef9a56997f1849a02f3878725cac6c11 SHA-256: 094558aba5f5f98803b19c6509854ff87a7566c9cd7571a5c192b6adb69d5501
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 disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://philabc.ru/uplcv?utm_term=kissing+booth+1+full+movie+2018+download PDF link annotation
    • http://bradzo-ep.com/uploads/files/xugotaboxopu.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/87451806723.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/puvugukorogogenebabona.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/18110683404.pdfIn PDF document text
    • https://www.confirmedtour.com/files/vewilafifowa.pdfIn PDF document text
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/22821827619.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a4b1d905a---29568756134.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/birelogoni.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/ridejojokufovidejusijimo.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/puzuxizeradikuvuf.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/99968969711.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/26641923422.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/1295361241.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/gejezosop.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/rakira.pdfIn PDF document text
    • https://jotelek.hu/files/file/towefaxewaju.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/milabozuvapo.pdfIn PDF document text
    • https://vendax.ro/files/file/jikikiraliboxagupug.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/736a30ae8e35caa4e14809b25cc8afaa/fuvutakezutini.pdfIn PDF document text
    • https://bonekarusa.com/contents/files/zisekodewuzipomaguli.pdfIn PDF document text
    • https://tauthuy.vn/upload/files/xubafu.pdfIn PDF document text
    • http://tries.cz/media/images/upload/file/47107262554.pdfIn PDF document text
    • http://srilakshmienterprises.net/uploads/68941370462.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/60200702606.pdfIn PDF document text
    • http://aisne.proximeo.com/ckfinder/userfiles/files/roxaletemepumerijomajesem.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_off0000e376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE376 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB88 17776 bytes
SHA-256: 9cbf644008a8f1c385342bec0c52315a1e48e75323218e934d2d86559627bf25
font_02_sfnt_off000129c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C5 11588 bytes
SHA-256: f6f79f154a04f1f5ced1467b15b189b319a7acbf2562d10cf82857d2799b3a58