Malicious PDF — malware analysis report

Static analysis result for SHA-256 17717d0164508160…

MALICIOUS

PDF

70.4 KB Created: 2021-09-07 02:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 26f1ba08c06cce1840519ec1123312ec SHA-1: 4cc34ac3ae36c762563e60b1aebe2d803cfe7e16 SHA-256: 17717d0164508160dddcd1379dfb93b6a179830c5f45ed224c9823514c9ad662
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous embedded URIs were extracted, with several pointing to compromised CMS uploads and raw IP addresses, suggesting a phishing or malware distribution scheme. The document's structure and the nature of the URLs indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090a49350c22---sezosewux.pdf In PDF document text
    • http://glampingcaravan.com/userfiles/file/20210826053058.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65905934675.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/cp1t2o8j1msd7op02k4m9d0tnv/84237449482.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ba471a2f6e2---kokibexulebigida.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/pilatuku.pdfIn PDF document text
    • http://grandchainfamilyfoundation.com/clients/85333/File/95050923059.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/gopsmfkvthei03g4qhso888s6o/fetikujidatafarodajiliz.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/81545445710.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78b8be710e---53722309999.pdfPDF link annotation
    • http://prodottoitalia.eu/userfiles/files/29979771442.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100a426baced---pijipexurizoposawe.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/04fadd6eaf0f744b9cfa839dd782cc80/51787260998.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/ms09np5nlrbqg7pa82j444vdbs/nugazasaw.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210619_D7D2A55F0B9CB874.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/cd87aa64e5ee9a93f307fd6546416991/bedukitojopixusetavufiw.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/oe9ducp43cd7svtmnp21uuss07/gezaxotiwozobutewozeku.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/48026907723.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/96069303536.pdfIn PDF document text
    • https://studiopros.com/userfiles/file/In PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/garemusedupijukus.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/95354012936.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/siximixoxakibelepujodujaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=lorrie+moore+bark+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB475 15856 bytes
SHA-256: 55454e0aebda2883d50cf6f757a26cba857e065055813ca3dae3b37a21092bf4
font_01_sfnt_off0000dcb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB8 10432 bytes
SHA-256: 8b1fe6c1d32edccd7dd2415b76966dd1045697b11939bcf946df24a4df1ed12c
font_02_sfnt_off0000f41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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