Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62cda3f3cc7f478…

MALICIOUS

PDF

20.1 KB Created: 2019-04-30 08:56:17 +01:00 Authoring application: mPDF 5.7
MD5: be6105a79f0c9a480548b360f590fec8 SHA-1: 51082c1523a358a1940dd499ec4e36608dd9623e SHA-256: f62cda3f3cc7f478e2a59df13de5b4f61f545e6d9849846424bcdadd39c56cae
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 specific intent of these links is unclear due to the 'confirmed_benign' labels on some, the sheer volume and the ML classifier's high confidence suggest a malicious purpose. The attack pattern is likely related to SEO manipulation or distributing further malicious content via these links. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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/4093096091097093/Finding-Ecstasy-How-Buenos-Aires-a-Brazilian-and-the-Blues-Saved-My-Sex-Life-by-Rebecca-Pillsbury.pdf
    • http://loaminoo.linkpc.net/1097098093093/Dirty-Secrets-Dirty-War-Buenos-Aires-Argentina-1976-1983-The-Exile-of-Editor-Robert-J-Cox-by-David-Cox.pdf
    • http://loaminoo.linkpc.net/1091099094098099090/Exchange-Rates-of-the-World-Cours-Des-Changes-Du-Monde-Devisen-Kurse-Der-Welt-Verdens-Walutakurser-Vol-3-January-1st-1914-December-31st-1921-Daily-Jour-Par-Jour-T-glich-Daglig-Bombay-Buenos-Aires-Calcutta-Cape-Town-Constantinople-Lima-Li-by-Emil-Diesen.pdf
    • http://loaminoo.linkpc.net/5098094093093097/Professor-Borges-A-Course-on-English-Literature-by-Jorge-Luis-Borges.pdf
    • http://loaminoo.linkpc.net/7099096098094099/Borges-And-Borges-Illimited-by-Florence-de-M-redieu.pdf
    • http://loaminoo.linkpc.net/9095096091093093/Willis-Russell-Bray-the-Color-Purple-the-Musical-Vocal-Selections-Book-by-Allee-Willis.pdf
    • http://loaminoo.linkpc.net/7093096098091097/Jorge-Luis-Borges-Selected-Poems-1923-1967-by-Jorge-Luis-Borges.pdf
    • http://loaminoo.linkpc.net/7096096097093095/Buenos-presagios-by-Terry-Pratchett.pdf
    • http://loaminoo.linkpc.net/4093094091099095/Harvest-Moons-by-Melisse-Aires.pdf
    • http://loaminoo.linkpc.net/2092090094096096/Apocalypse-Mom-Diary-of-an-Ordinary-Woman-in-a-Not-So-Ordinary-World-Apocalypse-Mom-Series-1-by-Elizabeth-L-Jones.pdf
    • http://loaminoo.linkpc.net/2096094099095/The-Best-of-Connie-Willis-Award-Winning-Stories-by-Connie-Willis.pdf
    • http://loaminoo.linkpc.net/3097097094094091/Time-is-the-Fire-The-Best-of-Connie-Willis-by-Connie-Willis.pdf
    • http://loaminoo.linkpc.net/2091092090092/The-Essential-Ellen-Willis-by-Ellen-Willis.pdf
    • http://loaminoo.linkpc.net/3092092094098099/Fictions-by-Jorge-Luis-Borges.pdf
    • http://loaminoo.linkpc.net/3092097090099/Ficciones-by-Jorge-Luis-Borges.pdf
    • http://loaminoo.linkpc.net/4093091096090/Dreamtigers-by-Jorge-Luis-Borges.pdf
    • http://loaminoo.linkpc.net/3092096096097/Collected-Fictions-by-Jorge-Luis-Borges.pdf
    • http://loaminoo.linkpc.net/1093099098094096/Brodie-s-Report-by-Jorge-Luis-Borges.pdf
    • http://loaminoo.linkpc.net/6093095095092094/This-Craft-of-Verse-by-Jorge-Luis-Borges.pdf
    • http://loaminoo.linkpc.net/4094095097092093/A-Personal-Anthology-by-Jorge-Luis-Borges.pdf
    • http://loaminoo.linkpc.net/7099096098094099