Malicious PDF — malware analysis report

Static analysis result for SHA-256 474e6d943113b5ea…

MALICIOUS

PDF

82.4 KB Created: 2021-09-05 18:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ff2af46182a662b739b009b59763a217 SHA-1: f9df366b59c72f71b8acad47e3d313d0bf057bcf SHA-256: 474e6d943113b5ea816287c57e8734e810e76b98cd52a1d1b69bcd7e530d3c60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content, likely leveraging T1566.001 (Spearphishing Attachment) as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ankamet.com/userfiles/file/semuvutere.pdf In PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/s05t4pv0ash330u57eujsp1pio/84111164302.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pozenutimowowonelimujin.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/30293856139.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160852f2487440---27517120993.pdfIn PDF document text
    • http://derma-dts.de/files/file/fovivaruxorebewaxum.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/59340908319.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/72820428680.pdfIn PDF document text
    • https://ajambary.com/userfiles/file/40551364675.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/potjk5b6k3jmeh5lq9jqocnlp0/xodotamusep.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/76542096295.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/o7uhmkkpv7agu5valrdlrnuhe1/porosedusotepawoduwitulu.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/turutelubevugabufu.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/6c8a28d432353f7bb7d3e79628efeb6a/kugozoxunudawifunewu.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/92559948640.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/15911930397.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/36001647074.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881bd333290---85441220672.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/bivitawosus.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/pamowumax.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/lexibemubedorol.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/31907281750.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/a06f631f4a64272712ae25a2d974c3b5/kusizikotozufazujesukat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=deep+learning+for+computer+vision+with+python+imagenet+bundle+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_off0000da2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23C 17568 bytes
SHA-256: 4702c53af07bce45bb322b4ab0b17b982763bba2e005a748ab6b0c4adb54d7d1
font_02_sfnt_off00012014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12014 11576 bytes
SHA-256: 9a31a08713521163e9afcb5cc068aae995d13300850da1d43384add1a8888fc9