Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0d9709a04f0440…

MALICIOUS

PDF

85.0 KB Created: 2021-09-01 07:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b30ff9b1b1ac205255862a7e9ce9b714 SHA-1: 07e9ef2235baf333b4dda3c5502a77db3b20d841 SHA-256: 1e0d9709a04f0440fd86858cb12812e2283cbcb531ac4ef18bd0be63a392566d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external URIs, many of which point to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure suggests it's designed to be a link farm, obscuring the true malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://pileshoppen.dk/userfiles/file/pabulibojuxijezem.pdf In PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc6239bf02---3053637040.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/2gph15i55rmtrn1a0dasaq65d5/wugejadoxeluzoseredimuz.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/32f657ea589538f619e712d101111e38/lowupifufuxugobeg.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/80fdf3f78e1930158a42d9031bbc7481/57205794377.pdfIn PDF document text
    • http://minipit.com/data/files/vaver.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16087051cb6b35---wasokuf.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100912aacd0c---rizewojuboja.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/ng1vvqj8o2pn69u7oie1tuap2q/muvavituduzomurexotabe.pdfIn PDF document text
    • http://dzbnf.com/upload/file///lurakegutamozikoj.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/33335223505.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/zesitobokolelonew.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/kukisapo.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/folekatuzigiwus.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/841fdefff6d28b753d18f456b174c881/fagadimovomomenuk.pdfIn PDF document text
    • https://iohrp.org/f_files/files/93476245835.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/30501880534.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa358ed26---92619183199.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/51593106924.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/pidoxa.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/16092612380.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/muwenogejonusulafigonuroz.pdfIn PDF document text
    • http://findacommodity.com/upload/file/simunavoriwonogiviponozu.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/70160922480.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=i+need+a+base+clash+of+clansPDF 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_off0000e564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE564 19280 bytes
SHA-256: 4f01767aaafa37a665fe62d29fdd95820f58fabedc996e672b4bfd0378bcc518
font_01_sfnt_off000116cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE6 10376 bytes
SHA-256: 4437514d08f182102ee3c3d8542f948dd3f52e23bd0c90fe2d3af07566916ced

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