Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d6cea0417a4def…

MALICIOUS

PDF

85.3 KB Created: 2021-07-14 00:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5496945c2fc57295439ca829fcd9b25e SHA-1: 569ec98e2cdfb40814c25a73248eaf16d461c291 SHA-256: c2d6cea0417a4def805ac475e8562f7735a42f58eac158baffe9d03b73f37663
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting. The primary purpose appears to be directing users to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://remont-elektro.eu/archiv/file/14297152078.pdf In PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/eb5e6367445e2499cf8d72348bc0850f/luxinamujerafevidajomo.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/lpeb163hmk53vliu35q577j1b2/faxuporovanuroparub.pdfIn PDF document text
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/30934817339.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/58357991098.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e205a9c56---fotoliwosifajoxuvimoj.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/e52523ddcaa230b3c184b8b95fa540bc/49566261592.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/41695927697.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16096d2dcca8fb---5277720690.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/37988355294.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/lenekigidatufuraviwafu.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/k9h0ufl4kf07gg1ejccqalom5b/81396016253.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/bubozulagomirapipabolaxu.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/49631984547.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606d173c0fbfe---zogonunejagib.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/3uh9gntqjsfj4pqds72b59fdp6/13526165576.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/55368830271.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/9630ffc759eb7d4f614266bc23ee1fe8/pitukiligiwolevavuruxiw.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d2150bf50---muves.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/durevexojelikijedagiwuwe.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210521040351154.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/4512884113.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/e12120eade717fac8d45ff00b8d2b98c/33405975362.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/9717670696.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/59651650815.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=watery+eye+and+nose+on+one+sidePDF 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_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 16836 bytes
SHA-256: 7298d5a9fcc34275615659e9ee1704d8d1970a4927f25c22a5d671c61f0414cb
font_01_sfnt_off00011818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11818 10300 bytes
SHA-256: 18b67e2888f769e39f742396ac1b875a53a44e11aab3d348d46dd8ca3bf2a7c4
font_02_sfnt_off00012f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1