Malicious PDF — malware analysis report

Static analysis result for SHA-256 6babcaf9933d12aa…

MALICIOUS

PDF

83.5 KB Created: 2021-09-17 11:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b156a518285ace0958576da733f20d3c SHA-1: ef46aad598520502a12385ad19a835e7f91b7522 SHA-256: 6babcaf9933d12aaaa90a885b676e379e570efa15a442275819b21d9ca2b2c0a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDF documents. The PDF also functions as a link farm, directing users to multiple compromised or disposable domains, likely to host phishing pages or download further malware. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://polymadeniyaglar.com/fckeditor/userfiles/file/94919796631.pdf In PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/hvbgp5q3prhocuuo7tjj9vj36t/soxabego.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/japiderimiwesurafosozibej.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/gulagoziz.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a22cadd562---jitoremuzotumezajit.pdfIn PDF document text
    • https://benmoonpharma.com/userfiles/file/652404789.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/rave214a2kbbab70alp0gogpvm/9645691717.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/44453367749.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/10348797339.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/vejuneluboboz.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/50822272087.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a93416031---77104252002.pdfIn PDF document text
    • https://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/9182550097.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16135108bed1e8---70851351334.pdfIn PDF document text
    • http://jamones-luna.shopcloud.es/ckfinder/userfiles/files/ferezukubemematelimowaza.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/11101443530.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/12170341326.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/jesewijasuzolef.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1aec6a20d---68520032240.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/88181600638.pdfIn PDF document text
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/93491391601.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/m5t2cgqj4uv6n3ukf4sa0m7m2h/vezaw.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/14914077034.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/86508645135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=dr+driving+game+hack+mod+apk+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_off0000e08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 17156 bytes
SHA-256: 1756a8d07e5dfa3e5408fc9146e0c7d6ad5055c1344565dbeb9c417b71ed08d9
font_01_sfnt_off00010d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12535 10940 bytes
SHA-256: d8365cc5cc37086abbba3f78c2524233943faa32b802cb2dfe5592a891a6455f