Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c802e9b0d9b8da7…

MALICIOUS

PDF

78.5 KB Created: 2021-09-17 13:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 87593b1709eee44fd616ef830aa0be63 SHA-1: 62c76dfc30c5995e5ab6733dee1bdaeed14a17fc SHA-256: 7c802e9b0d9b8da7fee2cf0287d4ddca5e8f3a194d4fd0615c7897f14a85d869
192 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple URLs, some of which are part of a link farm hosted on compromised or disposable domains. The presence of a 'download button' lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 9

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/uplcv?utm_term=drift+car+game+apk+download PDF link annotation
    • http://harasim.cz/uploaded/files/81991780126.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/90106171802.pdfIn PDF document text
    • http://ashioke.com/images/library/File/76948483096.pdfIn PDF document text
    • http://quimis.net/js/ckfinder/userfiles/files/duguwatif.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/71975710435.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/mafopezuseb.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/28485509677.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/71199844070.pdfIn PDF document text
    • https://subded.org/userfiles/file/xemanobopofijaketafuxo.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613517054e81d---52645446328.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/jatolilojabun.pdfIn PDF document text
    • https://supremeroi.com/FCKeditor/file/vukemazizepem.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/gawasiveb.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/31166856351.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16134f3b094e46---logabuvexuvunixowu.pdfIn PDF document text
    • http://adice-area.com/pictures/files/dakimevatapexof.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613607facc0e8---33910181152.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/69041569182.pdfIn PDF document text
    • http://exim5.hu/_user/file/kiluv.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/44118959731.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/7404550511.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1613c29b052d29---92167630433.pdfIn PDF document text
    • https://tanhaithanhvalves.com/quangcao/admin/file/33601935158.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_off0000cde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE7 10972 bytes
SHA-256: e33e4d7c113fc0698034f09d76d7512ce1a70ed4e0d3476b40834561f0bf37e9
font_01_sfnt_off0000e739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE739 17456 bytes
SHA-256: 6a548bfa9fb7246ddde073eb8d96e5401e37b29c5e6ba56bafd5921d3f467b8f
font_02_sfnt_off000114b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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