Malicious PDF — malware analysis report

Static analysis result for SHA-256 95235f234085c39f…

MALICIOUS

PDF

85.0 KB Created: 2021-09-02 04:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6b729e28c9b5459bc48a3f0d5e48ec3c SHA-1: b93fa4aef7d9cee06e32571df022cd292e2b1e6d SHA-256: 95235f234085c39f6dffb47cf4a459b84ce31caa3f09e6e9ff8e3cef9dcfab27
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or domains associated with link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is heavily obfuscated and unreadable, providing no direct user-facing content but the presence of multiple links to potentially malicious sites is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://oniceh.ru/uplcv?utm_term=prince+of+persia+game+old+version+play+online PDF link annotation
    • https://eatorhours.org/e-bussiness/fckimages/file/48111740784.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/48varnm2moefd8pa9s6bk8djg5/70675165397.pdfIn PDF document text
    • http://canyonmeadows.org/userimages/48413029599.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/19679672692.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/68d36adb85d27e8de225124f35eab9c1/98229215355.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/73628875605.pdfIn PDF document text
    • http://davcpundri.com/css/file/27139642255.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/0s3knjo77um53898ir4kl7onn6/solomolofogosimam.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/rowuzamuwemebab.pdfIn PDF document text
    • https://eslms.com/userfiles/file/xixaparomejikasatagi.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/38424896618.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/nezemusetosutewuvod.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-7-25/20210725140120595642.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b102c02ff6c---xikojoniliwifanexoxeniko.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/fibojubipoxedizevi.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/petamol.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/2f1a8d1c2ff83cafe9d3ef6340eac482/bajitibuzawomef.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/896ogjab01ib75funjrg3m4rr7/78052474667.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/dd79662970a5cd39d99300dd2857a55f/23480985251.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608426fdcfc45---razokirubojofojovukikokop.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/66594064549.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/99950355718.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/1440322669.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/kifotoraxuzovadimenaf.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210620061053.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_off0000df8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8F 11044 bytes
SHA-256: c39cc7db1d98e872e6e53961b02b9ef16f2879f6ea46fb1d27159b90f61e431c
font_01_sfnt_off0000f90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11121 20488 bytes
SHA-256: a3cf8b2fa226f5d0dea61dbfab9da68ef5e5184fec9ffe2588aecd10f281c67a

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