Malicious PDF — malware analysis report

Static analysis result for SHA-256 82292603b63f8249…

MALICIOUS

PDF

75.7 KB Created: 2021-09-18 04:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8c0e697212abf8b98e7feafa79b2c3f2 SHA-1: 58a8d5147549f8973b9f7bf0039e7c7e6bad1411 SHA-256: 82292603b63f82499db158c5f32fcf5af87447789638ad0cb952ace2469b2cfd
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 suspicious or disposable domains, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent, likely involving the execution of JavaScript to facilitate further compromise or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://stcforanebanglore.smcim.com/www/js/ckfinder/userfiles/files/28464576646.pdf In PDF document text
    • http://onfireinteriors.com/userfiles/82228123691.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/94273905173.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/lolugipikepevijenuzorexev.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/27414005047.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/1663881671.pdfIn PDF document text
    • http://creationart.hu/files/file/finasutukunimofufikoxu.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/diwupegigepugofinija.pdfIn PDF document text
    • https://vilnius.cvzona.lt/resources/img/files/vuwek.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/muzemixilipuguzup.pdfIn PDF document text
    • http://www.psyforyou.nl/upload/fckeditor/file/30909956988.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/196265338.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/59480985309.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68525017992.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/6462b014e968e0a6f9d084cad53cf45a/jukikisopu.pdfIn PDF document text
    • http://www.medic-pneumolog.ro/fisiere/file/xufabuzol.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/29710477942.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/3588470778.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210903070138.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/xudujaxiluxowira.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/gegiz.pdfIn PDF document text
    • http://pibar.tw/uploads/files/202109160008036899.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=trovo+smart+watch+app+downloadPDF 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_off0000c3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A1 17544 bytes
SHA-256: 591dc2f245c7a0b8e67c5710c4062b6c02c9fe872a5d8140e775c3310832a4c3
font_01_sfnt_off0000f10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10D 10668 bytes
SHA-256: 34a42dd3b0907fb2d63bf1a9f9e24d1355f2965e709a17fd764adc7700f3f8ed
font_02_sfnt_off0001096f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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