Malicious PDF — malware analysis report

Static analysis result for SHA-256 089e12073b2ee6b1…

MALICIOUS

PDF

37.0 KB Created: 2020-03-13 05:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b29a988582791bfcee100e24971a1ceb SHA-1: 3b9dd2574e89850f8ce158e6b43ca2606bb08a8e SHA-256: 089e12073b2ee6b1218afe825e50f2559c9a5cf983ba2ecdd9e58fc069361962
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF SEO link farm. The document body, though partially corrupted, contains a URL that points to a similarly structured HTML page. This suggests the primary purpose is to redirect users to external sites, potentially for malicious purposes such as hosting further malware or phishing content. No scripts were extracted, but the extensive link farm is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://mail.kevinmaillard.com/uploads/1/3/0/8/130874655/130874655.html#advantages+of+4th+industrial+revolution+in+africa
    • http://photoeditingbyemmie.com/uploads/1/3/0/6/130605194/911ba93df.pdf
    • http://artisticsitedesign.com/uploads/1/3/0/6/130639377/4034437.pdf
    • http://www.gwe-design.com/uploads/1/3/0/7/130775834/862ed0cfdee1.pdf
    • http://www.engravedshot.com/uploads/1/3/0/7/130775704/mebejesanu.pdf
    • http://doubleedgedswordministry.com/uploads/1/3/0/5/130588635/310548.pdf
    • http://xenica.designpreviewer.com/uploads/1/3/0/3/130323302/7537349.pdf
    • http://theyearofmytranformation.com/uploads/1/3/0/4/130483550/doforipuwatodi.pdf
    • http://consultingonfire.com/uploads/1/3/0/6/130639306/gowijiv.pdf
    • http://74-123-75-25.mgwnet.com/uploads/1/3/0/7/130739718/839ff0150f40.pdf
    • http://jesusdharma.net/uploads/1/3/0/5/130551202/7850634.pdf
    • http://verwarming.blockdias.be/uploads/1/3/0/2/130289002/xawenox-zafit.pdf
    • http://sprucemod.com/uploads/1/3/0/9/130969300/63ebf.pdf
    • http://fcflow.com/uploads/1/3/0/5/130539728/63378030b2d.pdf
    • http://overlandtravelinsurance.com/uploads/1/3/0/6/130605030/vavalosupovafosuk.pdf
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069b5.bin
0b35e715a980563ce8f2bd753562451fe709fcfdd936a1d81410735dccb74211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B5 7492 bytes

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