Malicious PDF — malware analysis report

Static analysis result for SHA-256 30564e3e9110932d…

MALICIOUS

PDF

82.4 KB Created: 2021-09-16 06:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fe17e0aae405ae402531cba41a96184a SHA-1: eed56636bd123423c12caff61765bfe42438cb7c SHA-256: 30564e3e9110932dd6b7bd88b80898f3013e819f93e809f11fde4ad4e639d5d5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The sample also exhibits characteristics of a link farm, directing users to numerous external URLs, many of which are hosted on potentially disposable domains. This suggests the primary purpose is to redirect users to malicious sites for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://fotofidelity.cz/userfiles/file/44836815608.pdf In PDF document text
    • http://autoscuolavalerio.it/userfiles/files/lojene.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/35789135632.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210902152818_fot5jd.pdfIn PDF document text
    • http://enricobarraco.com/files/15306146121.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/xilebidatizoninoroxoru.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/baganefi.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/59875591476.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/63993128687.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/snib6f6qkkqjdaocl9o8k601ou/46629252690.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/mepebozofopativu.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/rugopawapovijomaxodenekub.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/82642782066.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/80142319936.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/xadiku.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/vaxuzenidinimutoginovivix.pdfIn PDF document text
    • http://fruitsad.pl/images/file/podozibegu.pdfIn PDF document text
    • https://vsevolozhsk.mebel18.com/uploads/files/vogodoxalet.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/5637732873.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/rudiwikexir.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/11371933566.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/47142060568.pdfIn PDF document text
    • https://t2sc.me/userfiles/28507725899.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/79922963021.pdfIn PDF document text
    • http://msiutilities.biz/documents/gumusi.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/20027003386.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109152209312898.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/fubojikapogunot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=app+para+cortar+canciones+en+androidPDF 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
stream_003_off0000f2f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF2F0 18456 bytes
SHA-256: d31013754b13a57a64c3e87785bb60da5b73b2867208b76222aebef6d4fa0a23
font_00_sfnt_off0000db1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1A 10444 bytes
SHA-256: 17d5755fa0da1142508b3b1db88acaf8966a52104cecef7196dcae19cf5df5ef
font_02_sfnt_off00012210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12210 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1