Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ade6221edb7f38…

MALICIOUS

PDF

19.3 KB Created: 2019-04-30 17:51:10 +01:00 Authoring application: mPDF 5.7
MD5: 2d19cbb4badd9af7e3acc1a492d2f144 SHA-1: 1d4549a0d7ec5bee3e2aa736edfa579d82f141cf SHA-256: 50ade6221edb7f381875e5060b34d3a9f4b4c8040e71a81987fb43342d417d99
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to external PDF documents, all hosted on the dynamic DNS domain 'xiixmcuin.linkpc.net'. This indicates a link farm or SEO poisoning attempt, designed to drive traffic to potentially malicious or unwanted content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://xiixmcuin.linkpc.net/5208205200204208/Where-Is-Zak-A-Lift-the-Flap-Book-by-Graham-Philpot.pdf
    • http://xiixmcuin.linkpc.net/3208201203205200/Boo-Who-A-Spooky-Lift-the-Flap-Book-by-Joan-Holub.pdf
    • http://xiixmcuin.linkpc.net/1208201202200201/Welcome-To-Blue-s-Clues-A-Lift-the-Flap-Book-by-Angela-C-Santomero.pdf
    • http://xiixmcuin.linkpc.net/8209207200203205/All-Kinds-of-Families-A-Lift-the-Flap-Book-by-Sheri-Safran.pdf
    • http://xiixmcuin.linkpc.net/8209207201203204/All-Kinds-of-Bodies-A-Lift-the-Flap-Book-by-Sheri-Safran.pdf
    • http://xiixmcuin.linkpc.net/5207204203208209/In-the-Country-A-Lift-The-Flap-Learning-Book-by-Francesco-Pittau.pdf
    • http://xiixmcuin.linkpc.net/3201203202208207/Guess-Who-A-Lift-the-Flap-Animal-Book-by-Time-Life-Books.pdf
    • http://xiixmcuin.linkpc.net/5202201200200205/Is-That-a-Butterfly-A-Lift-The-Flap-Life-Cycle-Story-by-Claire-Llewellyn.pdf
    • http://xiixmcuin.linkpc.net/6205201202208203/Fascinating-Facts-About-Animals-A-Flap-Book-Full-Of-Surprises-by-Sue-Cassin.pdf
    • http://xiixmcuin.linkpc.net/4209203201203203/The-Little-Book-of-Letting-Go-A-Revolutionary-30-Day-Program-to-Cleanse-Your-Mind-Lift-Your-Spirit-and-Replenish-Your-Soul-by-Hugh-Prather.pdf
    • http://xiixmcuin.linkpc.net/2203209209200209/Find-Anthony-Ant-by-Lorna-Philpot.pdf
    • http://xiixmcuin.linkpc.net/1200201209206205208/Cat-Flap-by-Ian-Jarvis.pdf
    • http://xiixmcuin.linkpc.net/1207208208201209/Seventh-Journey-Book-1-by-Robert-J-R-Graham.pdf
    • http://xiixmcuin.linkpc.net/9201202206203/The-Methuen-Book-of-Modern-Drama-Plays-of-the-80s-and-90s-by-Graham-Whybrow.pdf
    • http://xiixmcuin.linkpc.net/7207203204203202/The-Intelligent-Investor-The-Definitive-Book-on-Value-Investing-by-Benjamin-Graham.pdf
    • http://xiixmcuin.linkpc.net/6207201202204206/Achilles-Helmet-Commissaire-Pierre-Rousseau-Mysteries-Book-1-by-Graham-Bishop.pdf
    • http://xiixmcuin.linkpc.net/4203206203208206/Lift-by-Rebecca-K-O-39-Connor.pdf
    • http://xiixmcuin.linkpc.net/1201207209201203200/Briefe-Eines-Dollar-Koenigs-an-Seinen-Sohn-Diese-Briefe-Schrieb-Der-Chef-Der-Schweinefleisch-Versand-Grosshandlung-Graham-amp-Co-in-Chicago-Herr-John-Graham-an-Der-Boerse-Unter-Dem-Spitznamen-der-Alte-Schweine-Graham-Bekannt-and-Seinen-Sohn-Pierrepon-by-George-Horace-Lorimer.pdf
    • http://xiixmcuin.linkpc.net/1200204202207209203/Der-Lehrling-und-ich---Gefangen-im-Lift-by-Tim-Langner.pdf
    • http://xiixmcuin.linkpc.net/6200203206203208/Opposites-Flip-the-Flap-series-Double-Delight-by-Mary-Novick.pdf
    • http://xiixmcuin.linkpc.net/4209203201203203/The-Little-Book-of-Letting-Go-A-Revol