Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0eb413bcf451b88…

MALICIOUS

PDF

70.6 KB Created: 2021-09-23 07:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 46fe33d2d2d48fde4c96044781a67f53 SHA-1: b1b637ba779a02d71832af583085a0d80d9f5c55 SHA-256: e0eb413bcf451b88a8743d4f330a5a96e91dd9aeb6e6341a0e65926617d7ac5e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or scam campaign. The presence of external URI links and link farm heuristics indicates the primary goal is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://pixomot.ru/uplcv?utm_term=free+fire+for+apk PDF link annotation
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16147808dd392c---15360749840.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/78169483979.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614273bfa8304---vofukapexi.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613df1515b853---19082994886.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614b5de781e30---1239063280.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/jogigedemunigixanaxox.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/forukix.pdfIn PDF document text
    • https://ozanetiket.com/TasarimAcarnet/serhali/upload/files/nuwatenedozega.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/57051342906.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613032b8d034b---nesinoxevezewe.pdfIn PDF document text
    • http://plafondchauffant.fr/img/user/file/jesixu.pdfIn PDF document text
    • http://soojuspilt.ee/files/file/nipepad.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/38638200632.pdfIn PDF document text
    • https://hilanguage-com-tw.triangle-design.com/files/89215897326.pdfIn PDF document text
    • http://chinahongji.com/d/files/sapun.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/90513945774.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/98108710788.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/tipig.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/43257383555.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/potalugivebewafomenu.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/21734588320.pdfIn PDF document text
    • https://bbox.ru/images/shared/file/46664631501.pdfIn PDF document text
    • https://miet.hu/kepek/vowaziviravagu.pdfIn PDF document text
    • http://poorclarescork.ie/images/nidawunulijarefim.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_off0000b607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB607 16004 bytes
SHA-256: a223135a54dfb042a0a000faff464f41a1433cfa31a0b6bbd812eb3eccc21c9b
font_01_sfnt_off0000ded1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E8 10004 bytes
SHA-256: 07724809ae8db617022e82b3fd7f315b28473b1bd1cf177ea7e8dbec757267c0

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