Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8ee22d64210d8b…

MALICIOUS

PDF

108.0 KB Created: 2021-07-13 09:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c0f3d624a9c3ce4179a1dd2513dd1876 SHA-1: 806ef89525fd17f757fdf0b650e82c745f9686fe SHA-256: fe8ee22d64210d8b8fd6fb6f09192ee29f0c719927ba4f7e060f7b5a4cdae9a5
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for credentials. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/lg7uv26v2hp8u9a650289ocg66/bigigafikawalo.pdf In PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/nqaggqgde705gjbteh44ak9tv3/19758914704.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a26ac74b4---gugutiludazovefunabez.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f64d2ba148---21828577290.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608381644fbc9---liramevivelusezonelufe.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/wobakakatesiji.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/guzugemenegedigorowatipo.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/kosojasudaxobireget.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/cdf6d769774864ef90b71d94294de8d9/jetizipebufopave.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16081bc91e3449---68697198822.pdfIn PDF document text
    • http://jkphotocon.org/data/userfiles/files/fukezoturajokubebi.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/9e6bbddc3bb21419ff3df98a910dc77e/60732687876.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/t793qu9nqhtn0oarqoh4df3697/suteboxofepivot.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/h7u3o6g1hfie5mla4s9gnfn7f1/piferu.pdfIn PDF document text
    • http://abc-tel.ru/data/File/sijofibotet.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16091723b7346f---kuras.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/nazososabelawumes.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a457f330c05---22735219429.pdfIn PDF document text
    • https://kurtwohndesign.ch/userfiles/files/80249740673.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/21426816820.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/6f98040c3f9615f59c6fcabf8af5f92d/tetuvalipon.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/a2f6b2c79d897342db05c32550c0baa1/degusek.pdfIn PDF document text
    • http://erictex.com/ufiles/files/54157565088.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b845d19b4---bukewafojamadulawajareza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=i+drink+water+but+still+dehydratedPDF 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_off0001425e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1425E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A75 10708 bytes
SHA-256: f4795ca069df36f7f340f70ee19c3d2ebd6b84a57996d4242970236fe7c1c917
font_02_sfnt_off000172fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172FB 17572 bytes
SHA-256: 1d1371d45d7f1516abd4224ff3ea4a3708e1e8f5773b2640275828a445c44684