Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47ed710d555ac58…

MALICIOUS

PDF

94.3 KB Created: 2021-07-22 19:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4b7fdfc7aa79029a988804b070e66ef1 SHA-1: 8b406f3a3c7bb8823c8e16147e2fd53dc3e07565 SHA-256: d47ed710d555ac58a9f231c6ea435035039f43b49646eaf9079f29b479395eb6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which appear to be compromised CMS uploads or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a pattern of using these sites to host or redirect to malicious content, likely for SEO manipulation or to obscure the true payload. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 6

  • 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.
  • 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://isvpro.com/custom/files/jelarivifefeb.pdf In PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/171dba06e316191662b5088f333f1e24/kakufonidutoro.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/lm6i5ta118jqku1mba4iqu8ml0/41646257654.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/98084e0ae816337d285b9bb9c4f7216b/rudiladizesusegunetex.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/zimugikevof.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1606d032bdf53e---buzeguwuge.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/a0a34cb445f172eb94783e60e3e2b5c2/keledagexodononinak.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d38292acf5---fibugifuguserujas.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210626135725_t8v9ag.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0e27dc270---tijasawiwixidera.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/282c3180f2419ca5b92cd8b14af03295/25253399373.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/gojuf.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/80304963065.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/68949039504.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/pagupadirojuwotige.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/61904352919.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d3835207181---kawebumasivad.pdfIn PDF document text
    • http://tj-1970-50yr.com/clients/e/e8/e8fccb6fb94f20b6ca4375945b3939e1/File/vokojasipugusakitujanolu.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b6829f375---50028140796.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/las5gth2rfg6tvqm1aic4rtm3r/28633303233.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/gawelopexanivezuwimil.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608467c4681ea---14337121546.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b88a4592f2d---23860994584.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/jejorakovafobobamap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=download+wwe+raw+vs+smackdown+2007+for+pcPDF 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_off0000facb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACB 3684 bytes
SHA-256: 9c958604e89996490b68537dbf8d13a9055714eca1af46eed0bef162b0fdc609
font_01_sfnt_off00010959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10959 11128 bytes
SHA-256: 677e4b484dfd39cd664d678b98a821103a61d584cfd56f5997c9c025a7da7d1d
font_02_sfnt_off00012377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12377 18040 bytes
SHA-256: 432cc4c19862f6d518ab97cb8ff2979e39598fa57944e1e204a89de6b514c7a7
font_03_sfnt_off00015292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15292 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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