Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a47cfb0dcf1010…

MALICIOUS

PDF

73.4 KB Created: 2021-09-17 12:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f86230e3a993d2229bb77c9c4d92e14e SHA-1: e04f14f892a7f600d967459cfdf1ee1ac4b5a8c9 SHA-256: 05a47cfb0dcf101040d6ac2c8f80e9dc58cc6d1ad8bad4b092ccfdbaa0b40cfd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and a large number of external URLs, many of which point to compromised WordPress sites or disposable hosting. The heuristic firings indicate it's a link farm designed to redirect users, likely to a malicious download disguised as a 'minecraft apk download'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the execution of further payloads via the embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • 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://wastran.ru/uplcv?utm_term=minecraft+apk+download+v1+16.0+53 PDF link annotation
    • https://latgalesamatnieki.lv/files/file/32278262979.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6bf7d45f3---kejewatotipobeperabulev.pdfIn PDF document text
    • http://lpxs168.com/filespath/files/20210901221430.pdfIn PDF document text
    • https://jmbarrenetxea.soinuenea.eus/files/galeria/files/fipugajanexadop.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/rizakedofalalumosol.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/77242950508.pdfIn PDF document text
    • https://renhedc.com/uploads/files/202109021452579497.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/xubulofomife.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/12223372466.pdfIn PDF document text
    • https://huanghecables.com/d/files/64935934523.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/83551394141.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/38556159285.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/83255058792.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/notuzokifosem.pdfIn PDF document text
    • http://disonde.com/filespath/files/20210914091503.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/52088909056.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613c647cc753b---wetik.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/werisukijewakogupitoraviz.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/33a133d945f03bd23db0542112936b8e/vemivodev.pdfIn PDF document text
    • https://labelmarket.pl/data/file/4915994974.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/tovir.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/19168541113.pdfIn PDF document text
    • http://signauction.net/userfiles/file/budurajufoli.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/dejuxilibigatasuzasapufe.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_off0000bae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F2 16344 bytes
SHA-256: 25e31e52857ea5a6bacd680421f9bb615c46da2b7b16de9990220dba22fa1879
font_02_sfnt_off0000fd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1E 11396 bytes
SHA-256: 11b96ecf89060a4077ec58158f95893388b65c4e4fd2053bcd94396b77669504

Open this report in the interactive analyzer, or submit your own file for analysis.