Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3751c30713cefb…

MALICIOUS

PDF

36.0 KB Created: 2020-06-19 06:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9a9249779b4d53f0b9db53ae8f2b93f SHA-1: 8d9ffb9707522ef804cd6d68daa9ff3b4c93b233 SHA-256: 0e3751c30713cefbc99ebcc7fecbac2bd589392266afb6c6cebc2146a90166b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as a dropper by ClamAV and exhibits characteristics of a link farm, embedding numerous URLs to other PDF files. The document body, though partially obfuscated, contains references to 'expert one-on-one oracle pdf' and includes external URIs, suggesting a lure to phishing or malware distribution sites. The presence of multiple embedded links points towards an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Dropper.Agent-8752618-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8752618-0
  • 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://mycdcfbc.com/uploads/1/3/0/5/130551219/130551219.html#expert+one-on-one+oracle+pdf
    • http://solutions4insurance.com/uploads/1/3/0/4/130476514/8c66468f3d.pdf
    • http://thebabyclique.com/uploads/1/3/1/0/131071240/5065434.pdf
    • http://kelseyleon.com/uploads/1/3/0/9/130969316/a7f93b1ce79f1.pdf
    • http://dynamicsleepconnection.com/uploads/1/3/0/8/130814416/jevelezodixo.pdf
    • http://cashforhousesnyc.com/uploads/1/3/0/7/130738559/1868631.pdf
    • http://bsermak.com/uploads/1/3/0/2/130287815/8653772.pdf
    • http://secondchancegal.com/uploads/1/3/0/3/130379509/5441234.pdf
    • http://newsprintedition.com/uploads/1/3/0/5/130550652/9127194.pdf
    • http://mail.christianhollowfarm.com/uploads/1/3/1/3/131379832/1000977.pdf
    • http://jadelacey.com/uploads/1/3/0/7/130739328/59a00ad6cc0bb.pdf
    • http://techtutorials.co.uk/uploads/1/3/0/7/130740062/04c83.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050c2.bin
029e819a6102ea81a8df5c26410a949217896858b60e83312bb1835458b39c62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50C2 4768 bytes
font_01_sfnt_off0000610d.bin
bc038630ae12019563364d934e0056b3346054f7f7ef67147cb3114042f5d394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610D 10360 bytes

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