Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f5e94312317df8…

MALICIOUS

PDF

45.9 KB Created: 2020-04-07 10:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7ba52fcf1d26fd7caf1c9cd4e2b6cfaf SHA-1: 615426937d547bace2c3f7b5f2cc1fd91e2762b5 SHA-256: f6f5e94312317df87472d6a9e0b152446099f7ca9339475eb43656f9f55e5e5b
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of SEO poisoning or a link farm, designed to drive traffic to these external resources. No scripts were extracted, and the document body text is largely unreadable, but the presence of numerous external links is a strong indicator of malicious intent.

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://1stmuserconcertkolkata.com/uploads/1/3/1/1/131164462/131164462.html#si+plus+que+parfait+conditionnel+passe+exercices+pdf
    • http://moralehemp.com/uploads/1/3/0/7/130775634/39e71dea.pdf
    • http://ngprestacaodeservicos.net/uploads/1/3/1/0/131070651/taxaginawudipat.pdf
    • http://ips10presentation.com/uploads/1/3/1/1/131164419/lovigomeziboba.pdf
    • http://jeffsof.com/uploads/1/3/0/7/130775015/85951e903375c33.pdf
    • http://gr8bonus.com/uploads/1/3/0/7/130739624/gapejepuzotamogolati.pdf
    • http://dreykinglive.com/uploads/1/3/0/5/130539820/156628.pdf
    • http://jodistaszakmarriageandfamilytherapist.com/uploads/1/3/0/5/130588220/nonatovadel.pdf
    • http://cmrmeetings.com/uploads/1/3/1/3/131383854/tivosuse.pdf
    • http://thejoyofsucculents.com/uploads/1/3/0/6/130620631/dedoledusafe_zelolofefenuxo_danalu_zuwowegupepovez.pdf
    • http://memphiscartonera.org/uploads/1/3/0/4/130491322/b8ef85e.pdf
    • http://ceo2b.com/uploads/1/3/0/4/130477040/zupizejefuzu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006637.bin
4c566a17867f8bc7ca7ae5fe05fd42daa4de1e8c84e8a18bf3110ccbfcc84ae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6637 9188 bytes
font_01_sfnt_off00008700.bin
cb6452e9807847c9107a431a6af5e72235709e8b25085eea962edc965a33ae5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8700 2316 bytes
font_02_sfnt_off00009177.bin
90deb383e8dcf5424953b42096f59f58c9edb774c5aeae68b38a1b2ad467dead		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9177 16412 bytes

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