Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb8db7413f97acd…

MALICIOUS

PDF

84.3 KB Created: 2021-10-08 04:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 700ba75c71b064d354fafb52f0173274 SHA-1: 84d03ee36e9040bd95bfc4384c4890941ac4d576 SHA-256: 0eb8db7413f97acdae69fc1d27082f98a1d585a364df4bbb0cbf2908084fe3b3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these links.

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 http://blpest.com/UserFiles/file/tamebasulafafiwabizoteb.pdf In PDF document text
    • http://biswasi.com/userfiles/files/fizanevume.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/wowanewotewumibibenejal.pdfIn PDF document text
    • http://hak-al.com/resimler/files/5347955447.pdfIn PDF document text
    • http://all4pets.cz/ckfinder/userfiles/files/52330079170.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/29064422161.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/cie7ssdh2av3vshev88vdafq9m/35337826993.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/jukawawuguduso.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/21320474718.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613996c0476d2---jozenekad.pdfIn PDF document text
    • https://ikima.fr/uploads/file/piseni.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/wupezikumukosinum.pdfIn PDF document text
    • http://zjbfjt.com/upload/files/pomubadiwigigejugeratosu.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/pusuvegajixibita.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/20257970319.pdfIn PDF document text
    • http://turatabor.hu/media/daxezijevaxazebibo.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/repulolekigoputubikiv.pdfIn PDF document text
    • http://petra-koparki.pl/Upload/file/59284591916.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16149713668b43---tumewodawofele.pdfIn PDF document text
    • https://uroci-kursove.com/userfiles/file/31700385755.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/11854211278.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/raridiwi.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/33568731940.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/zajotadodeko.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///32364015096.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=download+vce+exam+simulator+crackedPDF 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_off0000dd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6F 19600 bytes
SHA-256: 88c001be4761a25dafb352fb5d0ee406a99931d09c317915f31e630de71681de
font_01_sfnt_off0001100b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12822 10980 bytes
SHA-256: 7da10c9258cd220ce4728f38525565f23c2b1f618a1bb0ce39fbf8ace8f16b7e

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