Malicious PDF — malware analysis report

Static analysis result for SHA-256 efbd98248a7a11c4…

MALICIOUS

PDF

44.6 KB Created: 2020-06-07 17:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88f0a7cbbf500921d24bf37811dedf22 SHA-1: dcd93b0a86b7b00dfb977e12d864f577bb347ed5 SHA-256: efbd98248a7a11c4343011dc8121cfe68ae45b5dd64aebcf858faf24289e0a0b
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO spam campaign. The document body contains garbled text and some of the URLs, indicating the primary purpose is to redirect users to these external resources. No scripts were extracted, and the document body does not contain a clear lure, but the sheer volume of links points to 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://angelsofthesevenlights.com/uploads/1/3/0/2/130273582/130273582.html#companheiro+ma%25C3%25A7om+trolhamento
    • http://nrychen.com/uploads/1/3/0/6/130604336/1506858.pdf
    • http://vni3d.com/uploads/1/3/0/7/130739194/9306795.pdf
    • http://jesuspeoples.org/uploads/1/3/1/4/131437655/ae9dafcf0.pdf
    • http://ancestreetv.com/uploads/1/3/0/2/130288864/45d32b.pdf
    • https://ripogazas.files.wordpress.com/2020/06/vefopiralagitusus.pdf
    • https://sosunilavef.files.wordpress.com/2020/06/nivetowefijan.pdf
    • https://tukitifo.files.wordpress.com/2020/06/29809350830.pdf
    • https://tezebex184715663.files.wordpress.com/2020/06/xakojefamafirafixolu.pdf
    • https://xokiwija.files.wordpress.com/2020/06/xolezusa.pdf
    • https://kogezes.files.wordpress.com/2020/06/lewawovawelujevip.pdf
    • https://dojivoxavinu.files.wordpress.com/2020/06/povitadidabizojexidaxu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007591.bin
9953285daed86800cc523a396d26e06b4f735a709d12c9cd4a1f320c2a7cf249		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7591 1708 bytes
font_01_sfnt_off00007dfd.bin
c577fdb1b06532f17f313fa78b9e08ff3a5da69e64a232afd3d3f3673dd69b91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFD 13128 bytes

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