Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb1bf1e823f3d07a…

MALICIOUS

PDF

22.1 KB Created: 2019-04-30 05:04:01 +01:00 Authoring application: mPDF 5.7
MD5: 0cf0fa5521d52e3bc36ec4e888414e7a SHA-1: 70c65226495c52aa49be625f861698ae10383db4 SHA-256: cb1bf1e823f3d07a1fbb4fe853c6079073fd134b8bd047eabf07bb861efe3dbe
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While many of these links resolve to benign book titles, the sheer volume and the use of numeric slugs suggest a potential for SEO manipulation or as a distribution vector for malicious content. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification. No scripts were extracted, and the document body was heavily corrupted, limiting further analysis of the specific intent beyond link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

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/6092094091097092/8-to-Be-Great-The-8-Traits-That-Lead-to-Great-Success-by-Richard-St-John.pdf
    • http://loaminoo.linkpc.net/3092099097099094/The-Good-Among-the-Great-19-Traits-of-the-Most-Admirable-Creative-and-Joyous-People-by-Donald-Van-de-Mark.pdf
    • http://loaminoo.linkpc.net/1091093095097098098/The-Winner-s-Brain-8-Strategies-Great-Minds-Use-to-Achieve-Success-by-Jeff-Brown.pdf
    • http://loaminoo.linkpc.net/2092096090095091/A-Sandhills-Reader-30-Years-of-Great-Writing-from-the-Great-Plains-by-Ted-Kooser.pdf
    • http://loaminoo.linkpc.net/9092090090093/How-to-Think-about-the-Great-Ideas-From-the-Great-Books-of-Western-Civilization-by-Mortimer-J-Adler.pdf
    • http://loaminoo.linkpc.net/7096094091090090/Dear-Great-Grandpa-Love-Your-Great-Granddaughter-by-Nikki-L-Deschambault.pdf
    • http://loaminoo.linkpc.net/1091092098096093099/Eleanor-Rigby-The-Chronicles-of-Great-Love-and-Fall-of-Great-Empire-by-Zamir-Osorov.pdf
    • http://loaminoo.linkpc.net/1091092098096094097/Eleanor-Rigby-The-Chronicles-of-Great-Love-and-Fall-of-Great-Empire-by-Zamir-Osorov.pdf
    • http://loaminoo.linkpc.net/2093090098092090/A-Great-Idea-at-the-Time-The-Rise-Fall-and-Curious-Afterlife-of-the-Great-Books-by-Alex-Beam.pdf
    • http://loaminoo.linkpc.net/2099097096095098/The-Year-of-Reading-Dangerously-How-Fifty-Great-Books-and-Two-Not-So-Great-Ones-Saved-My-Life-by-Andy-Miller.pdf
    • http://loaminoo.linkpc.net/7097090090094096/The-Great-Betrayal-The-Great-Siege-of-Constantinople-by-Ernle-Bradford.pdf
    • http://loaminoo.linkpc.net/1093098096099092/Great-Lives-Great-Deeds-by-Reader-39-s-Digest-Association.pdf
    • http://loaminoo.linkpc.net/3096094091091093/The-Captive-Brides-Collection-9-Stories-of-Great-Challenges-Overcome-through-Great-Love-by-Susan-Page-Davis.pdf
    • http://loaminoo.linkpc.net/1098096094090091/The-Cond-Nast-Traveler-Book-of-Unforgettable-Journeys-Great-Writers-on-Great-Places-by-Klara-Glowczewska.pdf
    • http://loaminoo.linkpc.net/4092096090094097/All-the-Great-Prizes-The-Life-of-John-Hay-from-Lincoln-to-Roosevelt-by-John-Taliaferro.pdf
    • http://loaminoo.linkpc.net/5094094090097095/The-Great-Gatsby-The-Text-Guide-by-Richard-Parsons.pdf
    • http://loaminoo.linkpc.net/4093092092097093/Lost-Battalions-The-Great-War-and-the-Crisis-of-American-Nationality-by-Richard-Slotkin.pdf
    • http://loaminoo.linkpc.net/4093092098093090/The-Quick-and-the-Dead-Fallen-Soldiers-and-Their-Families-in-the-Great-War-by-Richard-van-Emden.pdf
    • http://loaminoo.linkpc.net/5097097091092095/The-Essential-Chaplin-Perspectives-on-the-Life-and-Art-of-the-Great-Comedian-by-Richard-Schickel.pdf
    • http://loaminoo.linkpc.net/5090099093092090/Saving-the-City-The-Great-Financial-Crisis-of-1914-by-Richard-Roberts.pdf
    • http://loaminoo.linkpc.net/1091092098096093099/Eleanor-Rigby-The-Chronicles-of-Great-Love-and-Fall-of-G

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