Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0b3285db212495…

MALICIOUS

PDF

37.8 KB Created: 2020-03-29 09:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 550fb4ba5b0215c9aa9410511d018d7e SHA-1: b830360cee2273b35df2ed9250c9bedee083b799 SHA-256: fc0b3285db21249530fd5ce256a8b77777f3c6d9fc862666bb9444b8f216ca96
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, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though heavily obfuscated, contains the text "Resolver desigualdades lineales" which appears to be a lure. The primary heuristic identified a "PDF_SEO_LINK_FARM" with a dominant host of mattweise.com, indicating a likely attempt to manipulate search engine results or distribute content from multiple domains. The embedded URLs are the highest priority IOCs.

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://reboundat.com/uploads/1/3/1/3/131383760/131383760.html#resolver+desigualdades+lineales
    • http://mattweise.com/uploads/1/3/0/2/130272260/4340715.pdf
    • http://freeiigrow.com/uploads/1/3/0/7/130740465/xusaxasufezonir_xeremimoliru_siwira_lobozafabofubum.pdf
    • http://skycloudcity.com/uploads/1/3/0/6/130639205/moxosemive_velizokud_disanam.pdf
    • http://naturalrobotics.net/uploads/1/3/0/7/130739806/vovuliginuberix-momin-ruvotokikujig-mijoviruxewemu.pdf
    • http://sybrcom.com/uploads/1/3/0/4/130483684/6545058.pdf
    • http://millscollisioncenter.com/uploads/1/3/1/1/131163984/lebufagoru.pdf
    • http://3rdgearwaseca.org/uploads/1/3/0/5/130589281/wiwufiju.pdf
    • http://opfutsol.com/uploads/1/3/0/5/130540026/zojibamunoxim.pdf
    • http://chadboswell.com/uploads/1/3/0/5/130588490/rizezezi.pdf
    • http://viperfishproductions.org/uploads/1/3/0/2/130288887/a91b9a9351b.pdf
    • http://chamoisinfo.com/uploads/1/3/0/6/130639493/zafaf.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_off000068f5.bin
5bb3a944173333eb7c90aad901aa7aa35c4d695c36eb839d4fda76c95c013fe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F5 9180 bytes

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