Malicious PDF — malware analysis report

Static analysis result for SHA-256 adbaf362facebd8f…

MALICIOUS

PDF

80.9 KB Created: 2021-09-01 11:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4e8aab80d2cee3f993266417d5d785ca SHA-1: 62701abe6f066b22f8a84b79a6c0a18e2a684bf6 SHA-256: adbaf362facebd8fa8f079894d3694f0f18f1f3cbb525cd5f92ec1090c5af054
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. The embedded URLs suggest the primary goal is to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://archism.ru/uplcv?utm_term=all+conditional+sentences+examples PDF link annotation
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846a0e8ce1b---dulurobuvavaludezumi.pdfIn PDF document text
    • http://lottfamilyreunion.com/clients/878857/File/saxibo.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/b94ca2ddba83e679da25dea7089b1d9b/ruletu.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/e630a4fc52ed355ccb8d627367ab1175/42337516937.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/71504934951.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/6d0afc56f0be95b17679227525fe7421/ximuribewosizuladubes.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210817042452.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/vavogokisafexibodisafa.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0de2d40d2---dozomad.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/nimepakoveninoparinekazal.pdfIn PDF document text
    • https://mimpishiosatu.com/contents/files/motabovibegupi.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/79145818065.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/83331334708.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads//files/202108092237387695.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/xeselamikirek.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/66075826762.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/0o4b4877gprkj5rvc800amcpld/litexojolozulavopajo.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/weravegazununufi.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/fce79ce98327f01d65e52c506739bb98/mexosebozubojib.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/47878145443.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073c445b824f---mifopuwek.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ffc7ffbc33d---tisozajesi.pdfIn PDF document text
    • http://www.zaluziemalina.cz/userfiles/file/13511007413.pdfIn PDF document text
    • 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_off0000d55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55F 10660 bytes
SHA-256: eb3531c14bb046901773770dd5015c8be7b829b037598d939b5dc8f347959540
font_01_sfnt_off0000edd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E3 18620 bytes
SHA-256: e0920c4ff4b4661e4e995f23b728abe48fdc6eadc9bb70050964639afea1087b

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