Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d62f2117acbf45…

MALICIOUS

PDF

23.0 KB Created: 2020-03-20 12:35:15 +00:00 Authoring application: mPDF 5.7
MD5: bba7adebc8ab48628efbc31e44f37b10 SHA-1: e57ed121ae78a5ae0810dca50c8f467b9d102289 SHA-256: e5d62f2117acbf4572a7a8b8fd52723a2d4301f33fc98651127c60dacf2aa7d9
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded URLs, identified as a link farm. The primary heuristic indicates this is a critical finding, suggesting the PDF is designed to redirect users to numerous external sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the link farm is sufficient evidence for the observed attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

Heuristics 2

  • 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.
  • 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://ieuicufioao.myhome.cx/6558554556555553/Laura-s-Album-A-Remembrance-Scrapbook-of-Laura-Ingalls-Wilder-by-William-Anderson.pdf
    • http://ieuicufioao.myhome.cx/3558555555554555/The-Laura-Ingalls-Wilder-Country-Cookbook-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/9551557556550556/Laura-in-der-kleinen-Stadt-Unsere-kleine-Farm-6-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/8550552553554/Laura-Ingalls-Wilder-and-Rose-Wilder-Lane-Authorship-Place-Time-and-Culture-by-John-E-Miller.pdf
    • http://ieuicufioao.myhome.cx/7551555555558552/Little-House-on-the-Prairie-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/3552553555556554/The-First-Four-Years-Little-House-9-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/3555559551559/Little-Town-on-the-Prairie-Little-House-7-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/3557556555554552/The-Long-Winter-Little-House-6-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/1555555554554553/The-Long-Winter-Little-House-6-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/3552553555556556/The-Long-Winter-Little-House-6-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/4550554550554555/Little-House-on-the-Prairie-The-First-Five-Novels-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/2555559557555558/By-the-Shores-of-Silver-Lake-Little-House-5-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/5553558559559553/La-Petite-Maison-dans-les-grands-bois-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/6559555559552555/A-Little-House-Sampler-A-Collection-of-Early-Stories-and-Reminiscences-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/3552554550557552/Old-Town-in-the-Green-Groves-Laura-Ingalls-Wilder-s-Lost-Little-House-Years-by-Cynthia-Rylant.pdf
    • http://ieuicufioao.myhome.cx/1553559551552557/The-Little-House-Cookbook-Frontier-Foods-from-Laura-Ingalls-Wilder-s-Classic-Stories-by-Barbara-M-Walker.pdf
    • http://ieuicufioao.myhome.cx/7552557552551/The-Heroine-s-Bookshelf-Life-Lessons-from-Jane-Austen-to-Laura-Ingalls-Wilder-by-Erin-Blakemore.pdf
    • http://ieuicufioao.myhome.cx/4559551556550554/Little-House-on-the-Prairie-Treasure-Chest-Little-House-1-9-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/1550554557551559/Little-House-in-the-Big-Woods-Farmer-Boy-Little-House-on-the-Prairie-On-the-Banks-of-Plum-Creek-By-the-Shores-of-Silver-Lake-Little-House-1-5-by-Laura-Ingalls-Wilder.pdf
    • http://ieuicufioao.myhome.cx/2553559554550550/The-Three-Faces-of-Nellie-The-Real-Story-Behind-Laura-Ingalls-Wilder-s-quot-Nellie-Oleson-quot-by-Robynne-Elizabeth-Miller.pdf
    • http://ieuicufio