Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2baebd4d6d0cfdc…

MALICIOUS

PDF

85.9 KB Created: 2021-08-23 20:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2cd34f219b0f66c2079ccaad5e18edcc SHA-1: 37b43e9a963b47c0e7716f924fc8289bcae20877 SHA-256: d2baebd4d6d0cfdc9b9e016c12310b065520595ac9ce365255cb55336ccefcd3
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of external URI heuristics and compromised CMS upload links further supports this. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 http://monkey-do.net/userfiles/file/62881977000.pdf In PDF document text
    • http://vladjurnalist.ru/archive/file/wuzafu.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611ade0531c93---polape.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/57656837757.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/10019127055.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/wizarorefuru.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/9788033181.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/bujogogilufukorutirem.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/taxodomegiwe.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/jevumilisujibemujan.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a82b8139b5---dafusanubixariw.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/c6m3fu4j3riudv0ktaiufub4g6/rewupitoriniviwezodi.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/83574545758.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/6fnj9nvbf73o9tvlq1udar4s79/82352966877.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/25675456170.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607f07c7240bf---57717680634.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/1d97d5324667bb53ea02d5120054bdee/80198266560.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/zojitigoxefife.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160fa5a707c2af---49109714071.pdfIn PDF document text
    • https://digireg.com/upload/67504913813.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/xetiduraz.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f84c3877103---34095836713.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/32882939624.pdfIn PDF document text
    • http://reikihaus.com/clients/75291/File/luxajuto.pdfIn PDF document text
    • https://mimpishio2bet.net/contents//files/76518034930.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/66592414157.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/jerakif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=simultaneous+stroke+and+myocardial+infarctionPDF 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_off0000eba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA5 11016 bytes
SHA-256: 089fca8de85dc0e5b30ee88723e3fb3d0a022b42f74d6e7cc0911a40544bf567
font_01_sfnt_off0001053d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053D 17076 bytes
SHA-256: d3bcfd521517329921c89f56a27a6e5421bbbd31a0846aee4cfec617ed513dae
font_02_sfnt_off00013158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13158 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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