Malicious PDF — malware analysis report

Static analysis result for SHA-256 548e980f65669f36…

MALICIOUS

PDF

83.0 KB Created: 2021-09-14 01:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 28aa46b86185e8dfc29e99a5f7d5ed60 SHA-1: d56bcbfc72aca89f7d61e2f74f9f68df67f3fbe0 SHA-256: 548e980f65669f36fb4df0cdff5f9c1b91adca185eab617f6c51a52e11619bbb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript actions and numerous URLs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://pixomot.ru/uplcv?utm_term=one+piece+bloodline+android PDF link annotation
    • http://srtcivilnorth.com/ckeditor_file/files/vajisinisumejuvekodena.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/pibadunoruratis.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/somususeduwofipirasuvibob.pdfIn PDF document text
    • http://www.centrosanmarco.eu/img/news/files/17909745926.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/wimetutavuz.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/e9145ab70070131f13bfb5d2aff5ea01/54698352850.pdfIn PDF document text
    • http://ocean-ex.com/images/blog/file/85153120155.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613081081705c---26646698237.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/77551745352.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99388330601.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613600ecdfd27---93062352680.pdfIn PDF document text
    • http://e-instar.com/userfiles/file/68650768670.pdfIn PDF document text
    • https://yasacompany.com/upload/files/xiloxegoxaxizip.pdfIn PDF document text
    • http://escritacontabilidade.net/fotos/news/file/51877176098.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/11734608644.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/68926406235.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/13872950028.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/pupune.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/34959612560.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/3986734243.pdfIn PDF document text
    • https://sassanoproperties.com/FCKeditor/file/674274366.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/56iqg7miso50ogl4cf5n4tmfg7/kaduloguwekakevux.pdfIn PDF document text
    • http://hiniceshine.com/upload/kosijilezuj.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_off0000d5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B3 10408 bytes
SHA-256: 55edb4ec05fec6ba038c2abe76526e4ca4dca00994698fc3a433d0b53598cd4c
font_01_sfnt_off0000ed11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 21980 bytes
SHA-256: 044f16aadf49eb93d3636dd5c6d381a46117acd3b2755f10729bd0124023af4d
font_02_sfnt_off000126b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1