Malicious PDF — malware analysis report

Static analysis result for SHA-256 0562570665472f36…

MALICIOUS

PDF

80.7 KB Created: 2021-07-06 23:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b3a59de21971dab4f151083cc0c57f0b SHA-1: 7883ce1432d264b663db0e914b7333ca58010f01 SHA-256: 0562570665472f36e71e96d8d712c051378eb2d826b09b1c90a4a115fb04301a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly suggests malicious intent. The presence of embedded JavaScript, while not fully analyzed due to obfuscation, suggests potential for further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606da61d7b306---50644450519.pdf In PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608594cb9fa6e---nefunowoxobigakabefujubif.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/4afaa0a5b786a199f8f5947bf2d10d0d/91286088394.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c88451e504c---43198167242.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/92411943172.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160beb54ae18fd---56232712315.pdfIn PDF document text
    • http://point-grey-1970-grads.com/clients/f/fe/fe7686cf254963525dc0bd811951f15e/File/sakujimadaxopuzidaxokiba.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/bomigigonavurepanakawoz.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/8086455303.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/rufonusare.pdfIn PDF document text
    • http://sciattella.net/images/file/wekasipuniwanoxelis.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f3ca968f2---gerekuxasikusosuxojal.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/rasagiveginorikenobekop.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/6eac64a6324ed48215ed1f6c87fbd1a3/dijatomekodinoxow.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16083040bb1799---meveteralidejodadem.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/gf7ti7at3eiiop4su89u5og2ut/kazuzodovofasepaseno.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93b9d154bb---5736192362.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/59479738539.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/bivonofevivosokesimuro.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/jamewugajijofutimaxofi.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c285a0c2aa4---94693958428.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/38751041562.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/ig7o6v1ti4kd7dee3fgp32flmf/kudakiriwofuwol.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210610082652.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/r43qnopul38ve13g2ldvin3uhn/dupokanafif.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e68bf86a46---tidanapanimagesuvotojen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=electrical+engineering+project+proposal+sample+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_off0000d87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87B 16520 bytes
SHA-256: ad44b2e5e012e9ae37ea9678b8214e8d949c3dfb76d9e63135aadd10827d6893
font_01_sfnt_off0001035e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035E 11076 bytes
SHA-256: a94e2da3b789854fc82cd0eab383650505fcdab0885c2b2095b87ee3e5949c41
font_02_sfnt_off00011ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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