Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08fa08a3a8d60ee…

MALICIOUS

PDF

112.9 KB Created: 2021-08-02 21:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ad76f5c95acf8ea0c43b1cdee511b9ae SHA-1: 19f7a073e2b76fe55ea7e04c44bf291a48ee4fda SHA-256: a08fa08a3a8d60ee4c08779bf6bd43834d56eeb843c1f92dbb3690fa7ea947f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://uniqrelation.com/userfiles/file/zugarasilutusisumetumawit.pdf In PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1319363b4---38670470280.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/kubikijugojaboxalejom.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/sagufaludoriw.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/lixelusijexu.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/46728641781.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/bofesedupilatoja.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/5419499plamu4dnjote882q2k5/8672392969.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f6e16ffc6---poxexugolowaz.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/rigadazozevem.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b59859cf72a---72276967111.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/kruv203l3skmolc1urb4egjs1q/norujesenemadidub.pdfIn PDF document text
    • https://www.natursany.com//ckfinder/userfiles/files/wapagowazodopux.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/l1ufu3jntnrh4ioc46vnttk24i/82947068392.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/70068100501.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/wavefovukiga.pdfIn PDF document text
    • https://penal-garazh.ru/files/kisamudabawuziker.pdfIn PDF document text
    • https://mimpishio2bet.net/contents//files/9479036661.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33ea7a751f---87553691615.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/c3pb5u0hi790n7chcs2jmclgdo/zezudagijuwolofekibazis.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/rexixumese.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8fc21f003---7680768995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=righteousness+by+faith+sda+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001721d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1721D 16356 bytes
SHA-256: 6520597057dd9403c72289b33873c275e11e6e76f46ada48ee25f53ac913c6b3
font_02_sfnt_off00019c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C85 11032 bytes
SHA-256: 1b9b260f8cf9ea1a822be02a6a276a241853e518d41a47001500a9b766f792ae

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