Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d27c65b1a7dd6b2…

MALICIOUS

PDF

96.7 KB Created: 2021-08-08 04:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7aecfaab7426727af8d013f88a620c9f SHA-1: 5cbbce705f6251b4e3d0449be7cfdd7f99c841fa SHA-256: 7d27c65b1a7dd6b2b65bcf398c48a9a997e0520fcf11454b5fa675672c7bbb5b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://banglatalkies.com/dynamic-images/cms/file/11187922295.pdf In PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16107e1545c7d7---retub.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961a22cbf05---48864783319.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/48103846987.pdfIn PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/tudisasefofa.pdfIn PDF document text
    • https://menu2uplus.com/images/file/4447489373.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f844e7807---69814605834.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/0cca3f8754b7b6683a4af23ecd312c02/59511512834.pdfIn PDF document text
    • https://parfumzone.ro/files/file/sejizakatewavefez.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/jr3gobs8nrhf3varatcmisplr6/14597335904.pdfIn PDF document text
    • https://unosms.us/userfiles/file/dorapute.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c141771a89---susufopitimidukir.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e39a5e96fb---67951284986.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/tazoka.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/sa5h3g3l2gnbmbte9fq8upi3lp/22999503174.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/r907f4hd3l5ee7pp0k7tmvkiiv/40598155807.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5afd30310---30542767574.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/ecd91b624da407f3cd2cb2dfe392ccb3/61087066591.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/d7do5k1tgtm9gmmmjoi9e12rpj/samopuzogigelad.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/2856c51a356d7c697bb9efb460d45a2c/lemaxefila.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/juzegipafomirukozeje.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/39962355238.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/81obq24psn79m8ln31f4teeidi/24568646732.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bb18deb9b---75282196900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+do+i+pass+the+safe+agile+examPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF5 17644 bytes
SHA-256: 10388b4d6e94bf6375bf9a7bb42577b75d29fac69b48c64f9b9271d2a4337066
font_01_sfnt_off000128f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14110 10920 bytes
SHA-256: 394c7f2c21567368d264224c4263ab669ae5133e215f2a38c5ccb4ec65d5da92
font_03_sfnt_off00015a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A31 17528 bytes
SHA-256: 77ec51ea477d53487e9efa5f59d321f4422097d648b822e9c8df7fa94c6d3b37

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