Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4078829fb9490de…

MALICIOUS

PDF

15.8 KB Created: 2019-04-30 04:25:58 +01:00 Authoring application: mPDF 5.7
MD5: cbef843defa50250dabef21b44fc0831 SHA-1: 2716b34c66412286f9f0ca0eba0549fb6544d6bf SHA-256: b4078829fb9490de17dd8095e4cc41d7a7d855699162a3b9b882a476d42981aa
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified as a link farm. While the URLs themselves are currently marked as benign, the sheer volume and the heuristic firing of PDF_SEO_LINK_FARM indicate a malicious intent, likely for SEO manipulation or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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/1090095096099093095/Phantoms-amp-Monsters-Strange-Encounters-by-Lon-Strickler.pdf
    • http://loaminoo.linkpc.net/3098098093097/All-about-Strange-Monsters-of-the-Recent-Past-Neat-Stories-by-Howard-Waldrop.pdf
    • http://loaminoo.linkpc.net/1091098093093092099/Encounters-with-Fire-Encounters-with-People-by-Shiho-Kanzaki.pdf
    • http://loaminoo.linkpc.net/4090094095091098/Expect-Nothing-Less-by-Warren-Strickler.pdf
    • http://loaminoo.linkpc.net/3090091096097093/Swords-Of-The-Phoenix-Queen-Gods-Of-Blood-And-Fire-1-by-A-J-Strickler.pdf
    • http://loaminoo.linkpc.net/6090099098098099/Gila-Monsters-Learn-About-Gila-Monsters-and-Enjoy-Colorful-Pictures---Look-and-Learn-50-Photos-of-Gila-Monsters-by-Becky-Wolff.pdf
    • http://loaminoo.linkpc.net/9095097097095/African-Monsters-Fox-Spirit-Books-of-Monsters-2-by-Margr-t-Helgad-ttir.pdf
    • http://loaminoo.linkpc.net/9092091094091/Pacific-Monsters-Fox-Spirit-Books-of-Monsters-4-by-Margr-t-Helgad-ttir.pdf
    • http://loaminoo.linkpc.net/3098098091097092/Lights-Camera-Monsters-Monsters-in-Hollywood-1-by-Lila-Dubois.pdf
    • http://loaminoo.linkpc.net/3095094095098091/Sleeping-with-Monsters-Playing-with-Monsters-2-by-Amelia-Hutchins.pdf
    • http://loaminoo.linkpc.net/2098093090099090/Love-in-a-Time-of-Monsters-Golden-Age-of-Monsters-1-by-Teresa-Yea.pdf
    • http://loaminoo.linkpc.net/2096095098091092/Sleeping-with-Monsters-Playing-With-Monsters-2-by-Amelia-Hutchins.pdf
    • http://loaminoo.linkpc.net/4092097096090099/The-Last-of-the-Monsters-Monsters-in-Hollywood-6-by-Lila-Dubois.pdf
    • http://loaminoo.linkpc.net/6097098090094/A-Darkness-Strange-and-Lovely-Something-Strange-and-Deadly-2-by-Susan-Dennard.pdf
    • http://loaminoo.linkpc.net/5098097097096/Phantoms-by-Dean-Koontz.pdf
    • http://loaminoo.linkpc.net/3094097099097/Phantoms-by-Dean-Koontz.pdf
    • http://loaminoo.linkpc.net/2092090097091096/Phantoms-In-Philadelphia-by-Amalie-Vantana.pdf
    • http://loaminoo.linkpc.net/1094094093094091/Ghost-of-a-Promise-Phantoms-1-by-Kelly-Moran.pdf
    • http://loaminoo.linkpc.net/2090096092093096/Phantoms-Pleasure-Circle-of-Three-3-by-Brynn-Paulin.pdf
    • http://loaminoo.linkpc.net/1098091095094099/Give-Up-the-Ghost-Phantoms-2-by-Kelly-Moran.pdf
    • http://loaminoo.linkpc.net/9092091094091/Pacific-Monsters-Fox-Spi

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