Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2984983a482387…

MALICIOUS

PDF

77.3 KB Created: 2021-09-06 19:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 022bea8e68c30f3246fda6f4411b3ba6 SHA-1: c4f68091b46a22e75bedd25e5e90b0d5420c6623 SHA-256: 1d2984983a48238714466e4c4351b35b871817b7544554d3a6007fd62c3a9fda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to external sites, some of which are hosted on compromised CMS platforms or disposable domains. This suggests an attempt to manipulate search engine rankings or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://proektasis.gr/admin/spaw2/uploads/files/sizasefuzotumegobuzo.pdf In PDF document text
    • http://travellerisland.com/files/22543102508.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/37665203809.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/dofulofidivovavuradovup.pdfIn PDF document text
    • http://yoron.net/up/files/24250590035.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160999e014ec5c---12302640797.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/8b26c22d3316e3dfdceb71315f883524/nawewerelijud.pdfIn PDF document text
    • https://tavio.ru/files/file/bitawoda.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/wufibufigemu.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/93100273069.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607e55fb95dec---vukazajefuzetijobudi.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/63891148580.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/24242719698.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/perepetumatitumijoras.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/2367609272.pdfIn PDF document text
    • https://transmilenio.net/datamont/userfiles/file/3394089287.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/0923441f4f642bba67f2308812bf1155/velexonuxabozamigenot.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/84579149689.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/joruji.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210904023758.pdfIn PDF document text
    • http://cmtsport.com/pliki/vixobakuxo.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/3lg9rf1m2sbe7104v7jfukj35g/naguvuzisak.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b681f9d4abb---nagijegilet.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/pugaradobon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=dna+replication+review+worksheet+keyPDF 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_off0000c7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBC 17860 bytes
SHA-256: 9e08fcb0fb27117610b827d79aa0255255d63ca8de9f432013a91d4b7be437bc
font_02_sfnt_off00010e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E41 10828 bytes
SHA-256: 577bcc994e0e98adc486cacf95ef74939278e668387e5f6f16ddf6d44ee42169

Open this report in the interactive analyzer, or submit your own file for analysis.