Malicious PDF — malware analysis report

Static analysis result for SHA-256 053902edfd2a9955…

MALICIOUS

PDF

80.0 KB Created: 2021-08-03 22:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cc595cda8a6b14e6b44e3a31df5e20ba SHA-1: bc0439828214c269de46fa61a1701a0f96354a06 SHA-256: 053902edfd2a99559f1ca1c826b2979275287ed31c329c76e47541d23cae6dd5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The sample was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links pointing to various domains, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF's structure and the presence of multiple external URIs strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dansensvenner.dk/imagesfile///pomigezemim.pdf In PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/fanidobubemidolumanu.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1ef9ca555---59889388340.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/senowojumafasovulak.pdfIn PDF document text
    • http://ucity69.com/clients/861769/File/54606417133.pdfIn PDF document text
    • http://betaempire.com/uploads/userfiles/file/file/wovis.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/87652802512.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/75ee8f572188a6137223522522f34a69/goluborimapitu.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/73405404559.pdfIn PDF document text
    • http://njnccualumni.com/clients/0/05/05b55d2c4c342460da0dc2f503861b12/File/wevubefuwuvoferapulabata.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210606095629.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/0a86c5d92d2d84c2cf11a1ed84ff5df1/sosudupexupivef.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/rqjoaidqbn3jera5fp1r2qi7q6/50700846095.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dac1a425eeb---fugijijakaxemuwabawek.pdfIn PDF document text
    • http://toyotarenta.net/FileData/ckfinder/files/20210725_CAC55DE219048109.pdfIn PDF document text
    • http://cnzgks.com/userfiles/file///14045063652.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/1751cabf0ed4e88c35dc8d13ca6635d6/sadazewoxedor.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/gafexivujaf.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/17912554639.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/runilemukimagumetewerat.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/82269509114.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=triangle+congruence+test+questionsPDF 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/rigIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 10616 bytes
SHA-256: 95d71ab845f1852010d0e5c55018360dcc69049442b2eb928f4e438503e15455
font_02_sfnt_off00010617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10617 17388 bytes
SHA-256: 58caf6078eff1dc06ef37c4821aea59f9c8271222d3630d22a03c30898074854

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