Malicious PDF — malware analysis report

Static analysis result for SHA-256 7205767dfbc422a0…

MALICIOUS

PDF

86.4 KB Created: 2021-09-13 08:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ba264490787490f7ab1801bee14fa3f2 SHA-1: 5f095045ff6207602c297b49d953223a94c5dbe4 SHA-256: 7205767dfbc422a0290d1116fb036ca45979cfe77560b2649cd5a9e51b4ddc90
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://gcr.goldcrownresort.com/magazine_files/files/mivolinozimif.pdf In PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/kilip.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///2325741332.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/24939288949.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/10172178623.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/liginedidulewegijetapov.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16136fe8901423---wujarataladufeb.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/28972462614.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/36045886757.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/kudarubalugibewubiwejotik.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/vuwitozevisazunenasutu.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/296183305.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/jebexowarene.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136c4e042275---22565070446.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/05165c0bbecb23207999c634776a59cb/subesowotuwowu.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/ketebitimalabagof.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7679c8ccd---32575739305.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/13348321958.pdfIn PDF document text
    • http://www.slappedtogether.com/editoruploadfiles/file/dixajimugigulavozebusabo.pdfIn PDF document text
    • http://cabini.it/userfiles/files/13830815561.pdfIn PDF document text
    • https://bselink.com/userfiles/file/96484794620.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/l5ecqeqicgpiiqusj5vvniu6q2/xabudogaxixupidowutilaz.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/padovevetidowovug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=magic+tree+house+book+5+pdfPDF 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_off0000e9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B5 18328 bytes
SHA-256: a628cb77c7332af5bf0f536497088002f591ceb95d62b79a8727fdd57bc48e7c
font_02_sfnt_off000131e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E4 11208 bytes
SHA-256: 6218d798bcf88cb222acfb3d7eac64cf32c296de4bed09c29b18115b9d141926