Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f38deeb0001a023…

MALICIOUS

PDF

91.4 KB Created: 2021-07-22 05:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 678c8fd59019243b33c04976857fff7d SHA-1: 89a75d6c88adcb9c95929d955eb00bc727b11308 SHA-256: 9f38deeb0001a023d04004e7c7618fff5aee412082ce896115c6b9b1aab12859
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure strongly suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/558af2e2799c1aa20d3229301af51b75/savabipogi.pdf In PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16078c2e8a391b---fusoxilemilidekopes.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf704cd75a1---zezem.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c44c71e631d---63356048967.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/4agpon35h5obnips3ou8mtc0i2/dowitesebubowowod.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607445f55f233---2377605219.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/3ce7eed8b8d4690aad8ee7555934cd4e/95675522138.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607195afa442e---99540609066.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/xaruvujinidezalike.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160eca9a783435---fekezevamewobixegise.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/prjiesti2u6casmcham70hj5n3/95775248528.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/l7issjri11m263ti0rjbonqsmb/48388512402.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/1417b8fe11b71a54bb5b5d628bf7ba84/kidiganakapazajib.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/7127jekatalb7dgdmv16q6vm98/15038975538.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/fipebapupejefupaf.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9edd1761a---pujun.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/a6ba7323ba9393004380539637f20302/lowizevaletusurilob.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/pewavam.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/nulegulifepokatex.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/kenogozodopudov.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/3891671804.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/83797533919.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ed04c4de6f7---79244455378.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=inductive+deductive+meaningPDF 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_off0001056f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056F 16944 bytes
SHA-256: 09fad8218ce328aca0489b7181813c8f1e14daa7662af1a406c6ba492f7b167b
font_01_sfnt_off00013151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13151 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14968 10396 bytes
SHA-256: 56cbbe2d0e204909ab4acb138cfa8ef2dc40cd943452f4533dcf7f16c8e3a99f

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