Malicious PDF — malware analysis report

Static analysis result for SHA-256 d379b41546b123f2…

MALICIOUS

PDF

116.6 KB Created: 2021-07-27 16:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1fcd3eb57ab31da96829f01f53803600 SHA-1: 62ee5ef9d200b96f460f7e92fc4d9c4f706719a2 SHA-256: d379b41546b123f2a1b94dfc11471d286ed85c60b1f598ef724c0d71e7506f7a
204 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF document contains a 'Clipboard command execution lure', instructing the user to copy and paste content into a shell. This strongly suggests an attempt to trick the user into executing commands, likely to download and run a second-stage payload. The presence of multiple links to potentially compromised WordPress sites and the ML classifier's high confidence further support a malicious intent, classifying it as a phishing attempt delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/dk3ir92r775g7nq6tgkai7tuj3/pajupurejutirisidelagere.pdf In PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/41333256195.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/ugjh1v1pqio3keovdilbi57ivg/jufutiv.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/4c310fe848f7637f8c90eeb4964bbcfd/11987686743.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a7d1aac83---31914027738.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/g9rtfpddnhk2vvs5qjqihhk0tn/87988578168.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080670501e8e---18337290709.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/4bff690e93f6bfa30240500bc4eda5ba/34848194611.pdfIn PDF document text
    • https://botorka.ro/userfiles/file/43098228686.pdfIn PDF document text
    • http://uniqueaddress.in/crm/files/43197161556.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/51327189014.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/fafaragepinasotede.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25aa354b79---napinex.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/fufuz.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/1031bc6c789ee3b2b01006dc1ed5cb33/52966250744.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af75ad0c3b8---81634602545.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210626_E140C9E7AA870A9D.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/41005246973.pdfIn PDF document text
    • http://doverhighschoolhalloffame.com/clients/2/2d/2d76883e1086210ef8e2c43836b0327f/File/45719689832.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210715_210548.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/h6rg5qski7nvvjvn9meeg8bsg4/62021508693.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/dd1febbbb8d784c275f34e99c22745db/wibezofedudekuwe.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/sugagavepokifaxufesub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=la+llorona+de+mazatlan+chapter+4+summaryPDF 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_off00015b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B8C 20912 bytes
SHA-256: 7fa5da94a88edf5d870a09d76ac2f2f8fca93a4ebdfb99bbaaac66de1b51a439
font_01_sfnt_off0001918a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1918A 10996 bytes
SHA-256: c9949fe2937c75bb470b1dd6a90d5e33f3ef0d0557c0bf4a2ae84dd8335a7222
font_02_sfnt_off0001ab02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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