Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba300e5319f0dd6b…

MALICIOUS

PDF

78.6 KB Created: 2021-09-23 16:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 853405ea0815a27d633700a545673617 SHA-1: 710a46916b093e57ba30cdfe1dfc3c7f4d23c9f9 SHA-256: ba300e5319f0dd6b61b2da686743e1b2e13987f2611cae6bd6c6d020968f635e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a large number of embedded URLs, many pointing to compromised WordPress sites using the formcraft plugin for file uploads. These URLs likely serve as a link farm to redirect users to malicious content or phishing pages. No scripts were extracted, but the nature of the embedded links suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://wastran.ru/uplcv?utm_term=android+file+management+system PDF link annotation
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f84b28742e---54511535159.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1614c414bcc4b5---pidamesinobu.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1f50f24f6---98099158191.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/87613633424.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f5c1c3ebc---sobegimu.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/80103846597.pdfIn PDF document text
    • https://inprovitecuador.com/ckfinder/userfiles/files/rukenox.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148adc0465af---telojibefimovun.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/rujalakokov.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0d9495cc1---4877946116.pdfIn PDF document text
    • http://aguito.madteam.net/ckfinder/userfiles/files/88213747815.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/tiranupesurovudarofo.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/fedogikisagoserixa.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/tikafofasejefakujubu.pdfIn PDF document text
    • https://istanajp.net/contents/files/37153897170.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/sedizi.pdfIn PDF document text
    • http://bjyhyy.cn/filespath/files/20210904215130.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/27269698632.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/zodipufezev.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/10771696063.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/tazejulunuvawuvo.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/cd44t6ks0u4g5gdhq46teurs09/7340834820.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451e24bcd40---43665928712.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_off0000d04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04F 10792 bytes
SHA-256: bd1bf144f4276fe346bba370cfd362ca69500275fe092d16c94ce80cf3c2195c
font_01_sfnt_off0000e8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F7 16984 bytes
SHA-256: 8291fa00642d81b0aa8fe03b8eef367f57b2b7eab5d8a830c401cb1960332141
font_02_sfnt_off0001144c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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