Malicious PDF — malware analysis report

Static analysis result for SHA-256 adcb7442f66e22dd…

MALICIOUS

PDF

33.4 KB Created: 2020-06-02 14:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aad8bbabd846debbf6c679aef571fe16 SHA-1: 8e9a9f0eb041f954b5923dc681a29dd824de5657 SHA-256: adcb7442f66e22ddcf7f6bfb1957b7c39805ad3e3c39c8895a3d2adf595988e4
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a likely attempt to distribute or host harmful content across multiple domains. The ML classifier also strongly suggests maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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
  • 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://housecleanershuntersville.com/uploads/1/3/0/7/130738803/130738803.html#the+missile+knows+where+it+is
    • http://surveypocket.com/uploads/1/3/0/3/130379266/zujapumulunewokofik.pdf
    • http://theelfbox.com/uploads/1/3/0/6/130604393/04cb6c4c777fc4.pdf
    • http://kootsykitsch.com/uploads/1/3/1/0/131070170/filunemobim.pdf
    • http://sandiegovolleyballcamp.com/uploads/1/3/0/5/130543878/d452085b82db.pdf
    • http://artbymetanya.com/uploads/1/3/0/5/130538866/2682245.pdf
    • http://66-162-180-3.wcreekoh.com/uploads/1/3/0/3/130313021/cda96eb9e162f4.pdf
    • http://thebrideonline.com/uploads/1/3/1/4/131453924/3135598.pdf
    • http://housecleanershuntersville.com/uploads/1/3/0/7/130738803/terms.html
    • http://housecleanershuntersville.com/uploads/1/3/0/7/130738803/dmca.html
    • http://housecleanershuntersville.com/uploads/1/3/0/7/130738803/policy.html
    • https://nizekifu.files.wordpress.com/2020/05/podisorelixogodibip.pdf
    • https://podinerexine.files.wordpress.com/2020/05/54339138029.pdf
    • https://xebepevixi.files.wordpress.com/2020/05/kapizokopafa.pdf
    • https://tebokak.files.wordpress.com/2020/05/69315036782.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_off00005910.bin
d52465f7d77c821045cb567208506cb32db99415a45cdd9a703aa3bb0981b71d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5910 9744 bytes