Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48d1c199f15ee7c…

MALICIOUS

PDF

81.9 KB Created: 2021-09-07 12:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 04bc2a96ee30320b8fb0f421fea1ff39 SHA-1: bcdd4f898f21c449db81270ea53dd3bce2820b45 SHA-256: c48d1c199f15ee7c2d65beda6376713e3a0f96259e5e6c26bb963c79a3660428
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://shih-tzu.ro/files/file/xijiwejuxalesabevoz.pdf In PDF document text
    • https://lotte-ppta.com/beta/assets/file/vewolalezumunenudiwisupug.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/mogafewusaxal.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/74620053886.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee694e080a---61669993235.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/tokoritatumirelixeb.pdfIn PDF document text
    • https://bajrahrs.com/userfiles/file/pinogulujupe.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/dd8a20ad905e5cbcec599435e5c76ba1/95835492348.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16088cbd5e5021---sorerofofa.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/d1husm7k2gemq7ng74vni4t0rg/bofodogujofitopobajinev.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/64335871937.pdfIn PDF document text
    • https://raljob.com/userfiles/file/vawotijoramod.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4115c209d---nuvopawanekukokuzigukufeb.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/58378024148.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/44467434079.pdfIn PDF document text
    • https://xn--23-6kci4asohe8k.xn--p1ai/userfiles/file/bazolide.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/73657000542.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/lemadivaginilukan.pdfIn PDF document text
    • http://falerisztika.hu/tmp/47602239710.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/79971812003.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/de75e4d530cfdfa00375a01b8b09baae/bopup.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/gibolusejinibugexogeru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=dell+precision+7540+specs+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_off0000d979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD979 18076 bytes
SHA-256: 04804a4204460cdf8c5af0b02ca862b7f62c75614ef99d419887990d8223319a
font_01_sfnt_off000108cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CD 10740 bytes
SHA-256: e99fc31457ae90674f3441bd5274c91559ba385ec57cc48e7cf58b09f53a4cca
font_02_sfnt_off000121a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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