Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d863943b20b7fca…

MALICIOUS

PDF

15.4 KB Created: 2019-05-07 05:31:34 +01:00 Authoring application: mPDF 5.7
MD5: 9ecb1136c4af3fbd581bc3edc7408b90 SHA-1: 2194dfac52d86822cad51a9c129226288b365292 SHA-256: 1d863943b20b7fca79d5b03e03761f446507d73b660ebe1939bfc732094e56be
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by a machine learning classifier as malicious and contains a large number of embedded links to other PDFs, a technique often used for SEO spam or to distribute further malicious content. While the document body is heavily obfuscated, the presence of numerous links to external PDF files hosted on 'loaminoo.linkpc.net' suggests a link farm or distribution mechanism. The ML classifier's high confidence score supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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://loaminoo.linkpc.net/3091098093093098/Ice-Cat-by-Linda-Newbery.pdf
    • http://loaminoo.linkpc.net/1096094093097091/Catcall-by-Linda-Newbery.pdf
    • http://loaminoo.linkpc.net/3092090095096/The-Sandfather-by-Linda-Newbery.pdf
    • http://loaminoo.linkpc.net/2096092090099099/Riddle-Me-This-by-Linda-Newbery.pdf
    • http://loaminoo.linkpc.net/3097091098095099/Blitz-Boys-by-Linda-Newbery.pdf
    • http://loaminoo.linkpc.net/6090090095093091/Quarter-Past-Two-On-A-Wednesday-Afternoon-by-Linda-Newbery.pdf
    • http://loaminoo.linkpc.net/6093091094098094/Shell-Casings-In-a-Crime-Scene-Shell-Casings-Tell-a-Story-by-Verge-LeNoir.pdf
    • http://loaminoo.linkpc.net/1094094098094097/The-Girl-On-The-Half-Shell-The-Half-Shell-Series-1-by-Susan-Ward.pdf
    • http://loaminoo.linkpc.net/4092097091091098/House-of-Bathory-by-Linda-Lafferty.pdf
    • http://loaminoo.linkpc.net/5097094098092/House-of-Silence-by-Linda-Gillard.pdf
    • http://loaminoo.linkpc.net/1091093090097092091/The-House-on-the-Beach-Pilgrim-Cove-1-by-Linda-Barrett.pdf
    • http://loaminoo.linkpc.net/1090091091095092098/Of-Virtue-Rare-Margaret-Beaufort-Matriarch-of-the-House-of-Tudor-by-Linda-Simon.pdf
    • http://loaminoo.linkpc.net/4098090091092096/Creaky-Old-House-A-Topsy-Turvy-Tale-of-a-Real-Fixer-Upper-by-Linda-Ashman.pdf
    • http://loaminoo.linkpc.net/9094097095096096/Pampa-Grass-by-Diego-Newbery.pdf
    • http://loaminoo.linkpc.net/1091091099092095/Daughter-of-Silk-The-Silk-House-1-by-Linda-Lee-Chaikin.pdf
    • http://loaminoo.linkpc.net/2093094099092091/Threads-of-Silk-The-Silk-House-3-by-Linda-Lee-Chaikin.pdf
    • http://loaminoo.linkpc.net/1099095098096090/Balderdash-John-Newbery-and-the-Boisterous-Birth-of-Children-s-Books-by-Michelle-Markel.pdf
    • http://loaminoo.linkpc.net/1090094097091099/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://loaminoo.linkpc.net/7095099099094092/Linda-s-Soup-Diet-Secrets-Reach-Your-Target-Weight-Faster-by-Linda-Lazarides.pdf
    • http://loaminoo.linkpc.net/2091091097096094/Escape-by-C-Shell.pdf
    • http://loaminoo.linkpc.net/5097094098092/House-of-Silence-by-Linda-Gillard.p

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