Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4bb64e2b1263a8…

MALICIOUS

PDF

78.3 KB Created: 2021-09-03 07:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3ee667d947d3001bccecb3eaf1688269 SHA-1: 23f447c0318f24d5f5152f0cd989b9596ca5eadc SHA-256: 2f4bb64e2b1263a803dcaaa950e5dae69ca9a6354df909223f8174c957053318
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious or phishing content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://nestaerospace.com/uploads/file/46783788225.pdf In PDF document text
    • http://shengnabei.com/uploadfile/file///2021080413464145.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/ls2ueer17fplqhuquno8csppl4/5267864505.pdfIn PDF document text
    • http://iscyber.com/userfiles/files/34846651122.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2d99bd38e---soziganosopudipi.pdfIn PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/38326514800.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/zugefikodono.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/49618407922.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/dusuledekoserefulab.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/56924264d8dc51c96593ab7ee563eb72/31734303613.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210615205152.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210624112126924910szkei.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202108272008408070.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2f86e0490---wezomeninuxamolen.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/19839597719.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/c44d61521894def96b931327974b4fe7/fidesixivunexu.pdfIn PDF document text
    • http://ledlight-lamp.com/mingyi/images/userfiles/file/vibokida.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160fddf6e5d2b9---kenakaw.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/27815564818.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f79a8364a---31259574671.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/90478148548e1461727e70b57488f3a7/mefafefoxirevagosajulaz.pdfIn PDF document text
    • http://deforma.it/userfiles/files/xuzobobogexujigusujezod.pdfIn PDF document text
    • https://hirurgija.me//files/6196292544.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/mukesixirawabafopolele.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=flowers+for+algernon+worksheets+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_off0000ce7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7E 10840 bytes
SHA-256: 7548f3794eae3271ae4a7e544d296967dff128f0d2d2eb084a392d08f6384e86
font_01_sfnt_off0000e759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE759 17208 bytes
SHA-256: 5cc6b95ecdd3e4ec4119a750f74a37f87f3c36b55f2cae84b8a7de721223b0e8
font_02_sfnt_off0001135a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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