Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0b8a0fa2bf37ae…

MALICIOUS

PDF

92.7 KB Created: 2021-08-20 08:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 101706e599c59c0cd1f0e1b8b75f284f SHA-1: 8164d2d5ccba12f67c01f70d1c9cd45a1c0317fc SHA-256: 2e0b8a0fa2bf37aec9c1369c6cc6a8a096b174f010dbc80baea6d1f3f9129ee8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to various domains, many of which are hosted on compromised CMS uploads or appear to be disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bjjiffy.com/upload/57261724237.pdf In PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/06e4e9eb3a699bcc4043e79a07181331/gixis.pdfIn PDF document text
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/giruzikejiwak.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210528001720.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/81849439113.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/nupavaleretup.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca5f3d43ad---wukimevi.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/raxizuropugogi.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/70784624199.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/54621058821.pdfIn PDF document text
    • http://tuhs1970.com/clients/a/ac/acc339db084e87cdfae31a76a6c96f1c/File/garupipefupul.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/22847519650.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/ditojogob.pdfIn PDF document text
    • http://www.enfersalus.com/ckfinder/userfiles/files/7464265044.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/28174152498.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/70dkso2t634bagko4pbhofkfh1/kituxosubolamupavaki.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/b79b624801a8468a0dc0a8040b837435/89119239906.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/35721872986.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/5vik44n263d7dgbv4b5eb8e810/63343951134.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fe457a869---72295235316.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+hack+wolf+online+ios+2019PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10146 17564 bytes
SHA-256: 0a5fd803db2687d4bd2e8792479b78cc5e92cfc3a192f4798af4a9ec0abc94b6
font_02_sfnt_off00012fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCE 17072 bytes
SHA-256: f6bc11297618b6ae3040d951acfde8b46a1dccd9cb74f53674528175344a9c9a
font_03_sfnt_off000148dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148DD 10964 bytes
SHA-256: 49615f3a515ead61e82a05592bc493c78dae2db6131a665def3607d83ff24139

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