Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34853214ebed09b…

MALICIOUS

PDF

35.3 KB Created: 2020-06-04 01:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 008b2e186298357350e885b3cf71188b SHA-1: a7891b12ed961c180a67fd8d5a8ed6e598f4ad30 SHA-256: a34853214ebed09b071ff70524ac5a096c0baaeba08b0674a5d4bc5d3eba643a
92 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a large number of external links, characteristic of a link farm or SEO scam. The document body itself is largely unreadable but contains references to the URLs. The primary attack pattern involves luring users to click on these links, which host further PDF documents, potentially leading to malware download or phishing attempts.

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://sarah-neale.com/uploads/1/3/0/7/130775728/130775728.html#verbes+en+er+au+present+exercices+a+imprimer
    • http://precisionvalleybaptistchurch.com/uploads/1/3/1/8/131871650/7787746.pdf
    • http://postmaster.ridgehockey.net/uploads/1/3/1/6/131637037/doxumepikexuv.pdf
    • http://thegoddessdiaries.org/uploads/1/3/0/2/130270783/zamidofup-penejivofafu-ponopibomomenu-guxowafitodu.pdf
    • http://sarah-neale.com/uploads/1/3/0/7/130775728/terms.html
    • http://sarah-neale.com/uploads/1/3/0/7/130775728/dmca.html
    • http://sarah-neale.com/uploads/1/3/0/7/130775728/policy.html
    • https://kurupava.files.wordpress.com/2020/06/mugemakuzidupedanema.pdf
    • https://gadifegex.files.wordpress.com/2020/06/mufosepu.pdf
    • https://jidolujov.files.wordpress.com/2020/06/15497048613.pdf
    • https://tegedow.files.wordpress.com/2020/06/29730848738.pdf
    • https://vakaturisemo.files.wordpress.com/2020/06/rezejoza.pdf
    • https://jisezos.files.wordpress.com/2020/06/xudijomubinetowavijaro.pdf
    • https://bosirijexon.files.wordpress.com/2020/06/winivof.pdf
    • https://dadisegikew.files.wordpress.com/2020/06/52751231929.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_off00005b1a.bin
1f92e1b312d7d35bb61a35847656755e9d1b004fc2e722db44acbeb731c0c5a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1A 12020 bytes

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