Malicious PDF — malware analysis report

Static analysis result for SHA-256 8af2eeb24feae841…

MALICIOUS

PDF

82.3 KB Created: 2021-09-07 09:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e953accc8ab5cb6f51d0254e1e583321 SHA-1: 3420cfecd6bf528622c6190df562df7f7e53ada8 SHA-256: 8af2eeb24feae841f19425e5c546e94790a75d3243b9536eb3bd97aafd28060b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised WordPress sites, suggesting it's used for phishing or distributing further malware. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/b2e652b736c250248423f286e5ba52ca/33954555127.pdf In PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/q9la67qcbue7sopoake7sj2d3n/10099231403.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/80da59c1ade8209020328247103b1031/tokid.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/q4k0l97rc02c2vahg1g50tma81/7857289283.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ddb278bb253---53230240548.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/2tt3ir59gu722io02324i5rlt7/lugigomusutal.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/zomirekinigu.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/h8rprsmt590q7hq6136u0lbiuh/28579482795.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160958deea832d---55615678617.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/17142853442.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/82491480632.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/soxeg.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/tunoramubowupusal.pdfIn PDF document text
    • https://www.utn.ac.cr//sites/default/files/files/vupajafiwafubawularewered.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/clblgkbtfaukq6vpkutpe4c3q2/67657289004.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d55324d9a1---mibolujexuxubevet.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/jasizipukunamosun.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/161248584d9623---kodotuko.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/vomedixiparetimunelimazo.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/34462678438.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/83396295423.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/begunaginelu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=template+invoice+pdfPDF 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_off0000dcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C2 18496 bytes
SHA-256: 02c0c971c14f32890c789bef52eb597db59e06a5bed09573c1b0e62a05e173c4
font_02_sfnt_off00012413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12413 10544 bytes
SHA-256: a057513834552b410df9b468de3cd63d957654c54a54e58d7156a911ff67dcba

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